Lot 3179

ETERNA-MATIC KonTiki 20 gents wristwatch 37 mm

Similar Sale History

View More Items in Watches

Sold

ETERNA-MATIC gents wristwatch SUPER-KONTIKI: ETERNA-MATIC gents wristwatch SUPER-KONTIKI with Gay Freres bracelet in steel, Switzerland around 1970, self winding, reference 130 FTP-3, screwed down case back with central Kontikigold-badge, screwe

2022ETERNA-MATIC gents wristwatch SUPER-KONTIKISee Sold Price

Sold

Vintage Eterna-Matic KonTiki Wristwatch: Stainless Steel Vintage Eterna-Matic KonTiki Wristwatch on Stainless Steel Eterna-Matic bracelet. 34mm diameter. Running at time of cataloging.

2023Vintage Eterna-Matic KonTiki WristwatchSee Sold Price

Sold

Jaeger-LeCoultre big gents wristwatch 37 mm in steel: Jaeger-LeCoultre big gents wristwatch 37 mm in steel, Switzerland around 1953, manual winding, two-piece construction case, screwed down case back, silvered dial with gilded hour-indices restored, gil

2021Jaeger-LeCoultre big gents wristwatch 37 mm in steelSee Sold Price

Sold

ETERNA-MATIC Centenaire gents wristwatch in steel: ETERNA-MATIC Centenaire gents wristwatch in steel, Switzerland around 1956, self winding, screwed down case, original steel-milanaise bracelet, silvered dial, raised silvered indices, silvered dauphin

2018ETERNA-MATIC Centenaire gents wristwatch in steelSee Sold Price

Sold

14k Gold Tiffany & Co Gent's Wrist Watch 32 mm diameter case, manual winding on a leather band with: 32 mm diameter case, manual winding on a leather band with 14k gold buckle

202314k Gold Tiffany & Co Gent's Wrist Watch 32 mm diameter case, manual winding on a leather band withSee Sold Price

Sold

Centenaire 71 Eterna- Matic 2000 Gent's Wristwatch.: Centenaire 71 Eterna- Matic 2000 Gent's Wristwatch.

2022Centenaire 71 Eterna- Matic 2000 Gent's Wristwatch.See Sold Price

Sold

MEN'S ETERNA-MATIC MID-CENTURY WRIST WATCH: MEN'S ETERNA-MATIC MID-CENTURY WRIST WATCH Men's Eterna-Matic KonTiki mid-century wrist watch with stainless steel case and leather band. Shipping / Pickup: We Can Ship This Item

2018MEN'S ETERNA-MATIC MID-CENTURY WRIST WATCHSee Sold Price

Sold

A Stainless Steel Eternamatic Watch, Kontiki 1960: 40 mm case diameter Kontiki Super Eternamatic watch with rotating black enamel bezel, black dial and radium baton markers, sweeping hands with date aperture at 3 o'clock, Swiss made manual movement wi

2023A Stainless Steel Eternamatic Watch, Kontiki 1960See Sold Price

Sold

Patek Philippe, Fine 18k Gold Ref. 3563/3 Gent's: Patek Philippe, Fine 18k Gold Ref. 3563/3 Gent's Automatic Wristwatch, circa 1980 Case: 34.5 mm, 18k yellow gold, two body, back secured with screw down ring, back set, 2698340 Dial: silvered, applied

2021Patek Philippe, Fine 18k Gold Ref. 3563/3 Gent'sSee Sold Price

Sold

Rolex Oyster Perpetual Gent's Wristwatch: A 1950's vintage Rolex gentleman's "Bubbleback" wristwatch, Ref #3131. Automatic wind movement serial #92708 with Black dial, Arabic numerals and sweep seconds. 30 mm Stainless Steel case serial #3194

2023Rolex Oyster Perpetual Gent's WristwatchSee Sold Price

Sold

Corum Admiral's Cup Gent's Wristwatch: Corum Admiral's Cup gentleman's stainless steel wrist watch, diameter 34 mm, with original case

2021Corum Admiral's Cup Gent's WristwatchSee Sold Price

Sold

18k Gold Omega Seamaster Gent's Wrist Watch: automatic, 33 mm diameter case, 7" bracelet 50.8 dwt gross

201918k Gold Omega Seamaster Gent's Wrist WatchSee Sold Price

Sold

Rolex 18k Gold Gent's Wrist Watch: double dial, brown face with white numbering 33 mm diameter caseback of case stamped "269745" (serial #)interior of case stamped "4221" (model #")1943

2020Rolex 18k Gold Gent's Wrist WatchSee Sold Price

Sold

Tag Heuer Aquaracer Gent's Wrist Watch: Model WAB2010, automatic, 300 meters, date window, sapphire crystal, black face 41 mm diameter case, stainless steel, 8" wrist

2022Tag Heuer Aquaracer Gent's Wrist WatchSee Sold Price

Sold

14k Gold Hamilton Curvex Gent's Wrist Watch: 21 mm diameter case with leather wrist band

202214k Gold Hamilton Curvex Gent's Wrist WatchSee Sold Price

Sold

Movado 18k Gold Gent's Wrist Watch: Kingmatic "S", winding 33 mm diameter case

2020Movado 18k Gold Gent's Wrist WatchSee Sold Price

Related Watches

Panthere de Cartier MM WJPN0007 WG Quartz Silver Dial Ladies Watch: Panthere de Cartier MM WJPN0007 WG Quartz Silver Dial Ladies Watch Type: Wristwatch Description of Item brandcartier modelPanthere de Cartier MM sizeCase size length: 27 Case size width: 27 Belt arm c

5 days LeftPanthere de Cartier MM WJPN0007 WG Quartz Silver Dial Ladies Watch

$10

Bulgari, 'Gerald Genta Gefica Bi-Retro' bronze and titanium wristwatch, Ref. GBS.Y.98: Bulgari 'Gerald Genta Gefica Bi-Retro' bronze and titanium wristwatch, Ref. GBS.Y.98 With Arabic numeral hours, jumping hour, retrograde minutes and date functions Dial: Black Movement: Automati

May 08, 2024Bulgari, 'Gerald Genta Gefica Bi-Retro' bronze and titanium wristwatch, Ref. GBS.Y.98

$2,000

Franck Muller, 'Galet' stainless steel wristwatch, Ref. 3002 L QZ: Franck Muller 'Galet' stainless steel wristwatch, Ref. 3002 L QZ With Roman numeral hours Dial: Black Movement: Quartz Case material:steel Case size: 30 mm Bracelet/Str

May 08, 2024Franck Muller, 'Galet' stainless steel wristwatch, Ref. 3002 L QZ

$100

Cartier, 'Tank Francaise' stainless steel wristwatch, Ref. 2302: Cartier 'Tank Francaise' stainless steel wristwatch, Ref. 2302 With Roman numeral hours and date function Dial: Silver Movement: Automatic Case material: Stainless steel Case siz

May 08, 2024Cartier, 'Tank Francaise' stainless steel wristwatch, Ref. 2302

$750

Tiffany & Co., Gold wristwatch: Tiffany & Co. Gold wristwatch With Roman numeral hours and moonphase function Dial: Silver Movement: Quartz Case material: 18k yellow gold Case size: 26 mm Bracelet/Str

May 08, 2024Tiffany & Co., Gold wristwatch

$500

Jaeger-LeCoultre, 'Master Control' gold wristwatch, Ref. 145.3.79: Jaeger-LeCoultre 'Master Control' gold wristwatch, Ref. 145.3.79 With Arabic numeral and sword hours Dial: Silver Movement: Automatic Case material: 18k white gold Case size:

May 08, 2024Jaeger-LeCoultre, 'Master Control' gold wristwatch, Ref. 145.3.79

$1,500

Vacheron Constantin, 'Teardrop' gold wristwatch: Vacheron Constantin 'Teardrop' gold wristwatch With Arabic numeral hours and seconds sub-dial Dial: Silver Movement: Manual wind Case material: 18k yellow gold Case size: 29

May 08, 2024Vacheron Constantin, 'Teardrop' gold wristwatch

$1,500

Cartier, 'Tank' gold wristwatch, Ref. 78087: Cartier 'Tank' gold wristwatch, Ref. 78087 With Roman numeral hours. Paris dial Dial: White Movement: Manual wind Case material: 18k yellow gold Case size: 21 mm Bracel

May 08, 2024Cartier, 'Tank' gold wristwatch, Ref. 78087

$3,200

Vacheron Constantin, 'Malte Dual Time Regulator' gold wristwatch, Ref. 42005: Vacheron Constantin 'Malte Dual Time Regulator' gold wristwatch, Ref. 42005 With Arabic numeral hours, date and dual time functions Date: 2000s Dial: Silver Movement: Automatic C

May 08, 2024Vacheron Constantin, 'Malte Dual Time Regulator' gold wristwatch, Ref. 42005

$6,500

Piaget, 'Polo' bicolor gold wristwatch, Ref. 7131: Piaget 'Polo' bicolor gold wristwatch, Ref. 7131 With sword hands Dial: Gold and black onyx Movement: Quartz Case material: 18k yellow and white gold Case size: 25 mm B

May 08, 2024Piaget, 'Polo' bicolor gold wristwatch, Ref. 7131

$8,000

Rolex, 'GMT Master II' gold wristwatch, Ref. 116718: Rolex 'GMT Master II' gold wristwatch, Ref. 116718 With baton and dot hours, date and GMT functions Date: 2007 Serial no.: Z922380 Dial: Green Movement: Automatic Case

May 08, 2024Rolex, 'GMT Master II' gold wristwatch, Ref. 116718

$20,000

Minerva, White gold wristwatch: Minerva White gold wristwatch With dot hours and chronograph function Dial: Silver Movement: Manual wind Case material: Stainless steel Case size: 38 mm Bracelet/Strap:

May 08, 2024Minerva, White gold wristwatch

$1,500

Audemars Piguet, Gold wristwatch: Audemars Piguet Gold wristwatch With Arabic numerals and baton hours and seconds sub-dial Dial: Gold Movement: Manual wind Case material: 18k yellow gold Case size: 32 mm

May 08, 2024Audemars Piguet, Gold wristwatch

$3,000

Tiffany & Co., Gold wristwatch: Tiffany & Co. Gold wristwatch With baton hours, perpetual calendar and moonphase functions Dial: Cream Movement: Automatic Case material: 18k yellow gold Case size: 35 mm

May 08, 2024Tiffany & Co., Gold wristwatch

$4,000

Patek Philippe, 'Grand Complications' gold wristwatch, Ref. 5040J: Patek Philippe 'Grand Complications' gold wristwatch, Ref. 5040J With Arabic numeral hours, perpetual calendar, GMT and moonphase functions Dial: Silver Movement: Automatic Case material:<

May 08, 2024Patek Philippe, 'Grand Complications' gold wristwatch, Ref. 5040J

$20,000

Vacheron Constantin, Gold wristwatch, Ref. 6068: Vacheron Constantin Gold wristwatch, Ref. 6068 With baton hours and seconds sub-dial Date: 1950s Dial: Gold Movement: Manual wind Case material: 18k yellow gold Case si

May 08, 2024Vacheron Constantin, Gold wristwatch, Ref. 6068

$3,000

More Items in Watches

Vintage Patek Philippe Ref. 600 18k Gold Watch: DESCRIPTION: Art Deco Patek Philippe & Cie 18K yellow REF#600 gold open-face pocket watch, champagne dial with baton numerals and with subsidiary dial, monogrammed, movement marked: "Patek & P

21 hrs LeftVintage Patek Philippe Ref. 600 18k Gold Watch

$2,500

Rolex oyster perpetual date adjust 36 mm watch,: circa 1969. Self-winding, stainless steel. Currently working but not guaranteed. Please note: this must be paid for by wire transfer, known check, or cash. Items will be shipped or sent to shipper onc

5 days LeftRolex oyster perpetual date adjust 36 mm watch,

$1,900

PATEK-PHILIPPE GENEVE 18KT GOLD OPEN FACE POCKET WATCH: PATEK-PHILIPPE GENEVE 18KT YELLOW GOLD OPEN FACE POCKET WATCH, SERIAL #196374, 19/20TH C., DIAM. 43.18 MM, W. 51.6 DWT

May 18, 2024PATEK-PHILIPPE GENEVE 18KT GOLD OPEN FACE POCKET WATCH

$1,100

Lot of Watches, Wrist and Pocket: This lot of watches would be used for parts. This lot of watches included a New Era Pocket Watch in an Alaska Metal case. The back is loose and the is a hairline in the porcelain, not running. There i

May 14, 2024Lot of Watches, Wrist and Pocket

$125

German 1936 Olympics Junghans Pocket Watch and Case: German 1936 Olympics Junghans Pocket Watch and Case extremely RARE and genuine, NOT a reproduction

4 days LeftGerman 1936 Olympics Junghans Pocket Watch and Case

$750

PATEK PHILIPPE, REF. 5275P-001 175th ANNIVERSARY, A FINE LIMITED EDITION PLATINUM HOUR STRIKE: PATEK PHILIPPE, REF. 5275P-001 175th ANNIVERSARY, A FINE LIMITED EDITION PLATINUM HOUR STRIKE CHIMING WRISTWATCH WITH DIGITAL JUMP HOUR JUMPING MINUTES AND SECONDS CASE NUMBER: 6’061’404;

16 hrs LeftPATEK PHILIPPE, REF. 5275P-001 175th ANNIVERSARY, A FINE LIMITED EDITION PLATINUM HOUR STRIKE

Preview Only

Group of Gents Watches (20): Including wristwatches by Dior, Aigner, Texas Instruments, Seiko, Nike, Enicar, Spirit, Jowissa, Pierre Cardin, Hard Rock, Diesel Time, Mido, JF, and Bulgari; together with an open-faced key wind pock

5 days LeftGroup of Gents Watches (20)

$500

14kt gold Cartier Concord gold wristwatch round,: white, black Roman numeral markers, Swiss made, genuine lizard band. 32 mm. Jeweled winder. Currently working but not guaranteed. Please note: this must be paid for by wire transfer, known check, or c

5 days Left14kt gold Cartier Concord gold wristwatch round,

$350

ROLEX, DAYTONA REF. 6265, A RARE AND IMPORTANT STAINLESS STEEL CHRONOGRAPH MADE FOR UAE MINISTRY OF: ROLEX, DAYTONA REF. 6265, A RARE AND IMPORTANT STAINLESS STEEL CHRONOGRAPH MADE FOR UAE MINISTRY OF DEFENCE CASE NUMBER: 4’128’401 Details CIRCA: 1976 CASE MATERIAL: Stainless with steel e

16 hrs LeftROLEX, DAYTONA REF. 6265, A RARE AND IMPORTANT STAINLESS STEEL CHRONOGRAPH MADE FOR UAE MINISTRY OF

Preview Only

Breguet Marine Tourbillon Chronograph Mens Watch Ref #: 5837br/92/5zu: Authenticity Guaranteed!!!!!Polished 18kt Rose Gold case. Beautiful Hand Engraved (engine-turned) black dial. Applied Rose Gold Roman Numeral Hour Markers on a silver chapter ring. Rose Gold "Breguet"

5 days LeftBreguet Marine Tourbillon Chronograph Mens Watch Ref #: 5837br/92/5zu

$37,000

RICHARD MILLE, RM35-02 RAFAEL NADAL, A RARE RED QUARTZ TPT AND DIAMOND-SET AUTOMATIC SKELETONISED: RICHARD MILLE, RM35-02 RAFAEL NADAL, A RARE RED QUARTZ TPT AND DIAMOND-SET AUTOMATIC SKELETONISED WRISTWATCH CASE NUMBER: 628 Details CIRCA: 2018 CASE MATERIAL: Red quartz TPT, bezel set with diamonds

16 hrs LeftRICHARD MILLE, RM35-02 RAFAEL NADAL, A RARE RED QUARTZ TPT AND DIAMOND-SET AUTOMATIC SKELETONISED

Preview Only

PATEK PHILIPPE, NAUTILUS REF. 5719/1G-010, A SPECTACULAR AND VERY RARE GOLD AND DIAMOND-SET: PATEK PHILIPPE, NAUTILUS REF. 5719/1G-010, A SPECTACULAR AND VERY RARE GOLD AND DIAMOND-SET AUTOMATIC WRISTWATCH CASE NUMBER: 1’452’074, MOVEMENT NUMBER: 3’910’005 Details CIRC

16 hrs LeftPATEK PHILIPPE, NAUTILUS REF. 5719/1G-010, A SPECTACULAR AND VERY RARE GOLD AND DIAMOND-SET

Preview Only

A LADIES PANTHERE DE CARTIER 18K GOLD WRISTWATCH: White dial with Roman numerals, stylized rectangular border, sapphire crown, on a matching 18k gold five-row maillon panthere link bracelet, quartz movement, case s/n 8669117595, case and bracelet sig

May 08, 2024A LADIES PANTHERE DE CARTIER 18K GOLD WRISTWATCH

$1,900

18K gold James McCabe, London. Rare Islamic trade pocket watch. Hunters case inlaid with diamonds: 18K gold James McCabe, London. Rare Islamic trade pocket watch. Hunters case inlaid with diamonds and rubies. Islamic inlaid verse "Presented to the King of Kuwait 1878(?)". Also, "Syed Mahomed Atas"

6 days Left18K gold James McCabe, London. Rare Islamic trade pocket watch. Hunters case inlaid with diamonds

$2,000

AUDEMARS PIGUET, REF. 26530TI, A RARE AND ATTRACTIVE EXTRA-THIN LIMITED EDITION TITANIUM ROYAL OAK: AUDEMARS PIGUET, REF. 26530TI, A RARE AND ATTRACTIVE EXTRA-THIN LIMITED EDITION TITANIUM ROYAL OAK TOURBILLON WITH EASTERN ARABIC NUMERALS CASE NUMBER: RJ9**** Details CIRCA: 2022 CASE MATERIAL: Titan

16 hrs LeftAUDEMARS PIGUET, REF. 26530TI, A RARE AND ATTRACTIVE EXTRA-THIN LIMITED EDITION TITANIUM ROYAL OAK

Preview Only

3 hrs LeftRolex Oyster Perpetual 36 126000-0006 - Oyster Perpetual Turquoise Blue Steel O36 mm

$1,125

Recommended Jewelry

21 hrs LeftVintage Patek Philippe Ref. 600 18k Gold Watch

$2,500

GIA 3.01ct Diamond Engagement Ring: GIA Certified 3.01ct L (presents K), SI2 Emerald Cut Diamond Center Stone Surrounded By 0.88cts Diamonds Set In 14k White Gold. Size 7.5. 5.7g. Scroll Through All Photos For GIA Information. Wire Tran

5 days LeftGIA 3.01ct Diamond Engagement Ring

$4,000

David Webb 18K Yellow Gold Heraldic Green Emerald Ruby and Diamond Brooch: David Webb 18K Yellow Gold Heraldic Green Emerald Ruby and Diamond Brooch Type: Brooches Metal: Platinum & 18K Yellow Gold Grams: 35.8 Exact Diamond Weight: 20 Cts Condition: Excellent. Signed By: WEB

Live NowDavid Webb 18K Yellow Gold Heraldic Green Emerald Ruby and Diamond Brooch

$1,000

Retro 18k Gold Cuban Link Necklace: DESCRIPTION: A retro 18k yellow gold cuban link necklace, stamped "750". Total Weight: 34.2 Grams (22 dwt) CIRCA: Late 20th Cent. ORIGIN: Probably Italy DIMENSIONS: L: 18" open CONDITION: Great Condit

21 hrs LeftRetro 18k Gold Cuban Link Necklace

$1,300

Schlumberger Tiffany & Co. Jeweled Camel Brooch: Rare Jean Schlumberger For Tiffany & Co. Camel Pin In 18k Yellow Gold. Meticulously Detailed F-H, VS Diamond Halter And Riding Blanket With Articulated Dangles. A Bright Ultramarine Lapis Lazuli Caboc

5 days LeftSchlumberger Tiffany & Co. Jeweled Camel Brooch

$9,000

Signed Tiffany & Co. Schlumberger 18k Yellow Gold Woven Link Bracelet 95 grams w/ Orig. Box: Title: Signed Tiffany & Co. Schlumberger 18k Yellow Gold Woven Link Bracelet 95 grams w/ Orig. Box Description: An opulent 18k gold woven link bracelet signed by Jean Schlumberger for Tiffany & Co. It

May 11, 2024Signed Tiffany & Co. Schlumberger 18k Yellow Gold Woven Link Bracelet 95 grams w/ Orig. Box

$3,200

DIAMOND ENGAGEMENT RING: Old European cut diamond. .80 carats, VS clarity, G-H color. Size 6.5

May 11, 2024DIAMOND ENGAGEMENT RING

$425

MIKIMOTO, DOUBLE STRAND CULTURED PEARL CHOKER WITH PEARL DROP: MIKIMOTO, DOUBLE STRAND CULTURED PEARL CHOKER WITH PEARL DROP Consisting of multicolor cultured pearls, ranging in size from approximately 8.50-10.50 mm, accented by colored diamonds (not tested for o

May 07, 2024MIKIMOTO, DOUBLE STRAND CULTURED PEARL CHOKER WITH PEARL DROP

$3,000

5 days LeftRolex oyster perpetual date adjust 36 mm watch,

$1,900

14k Art Deco Diamond Engagement Ring: An early 20th century Art Deco Period 14k White Gold and Diamond engagement ring. Domed filigree setting with milgrain detail and three round cut diamond approx. 0.31 cttw. Marked "14k". 2.3 grams tot

May 18, 202414k Art Deco Diamond Engagement Ring

$300

4.2ct Natural Emerald 18Kt Gold Ring: 18Kt gold deluxe set with 4.2ct natural emerald and 2 natural South African diamonds, bright colors, crystal-clean and good clear. Shape: Emerald-cut. Cut: Excellent. Internationally certified natural

May 08, 20244.2ct Natural Emerald 18Kt Gold Ring

$3,000

Fine Cabochon 12.5 CT Natural Sapphire & Diamond ring: Fine cabochon cut natural sapphire measuring 14.5 mm x 11.2 mm x 7 mm or approx 12.5 cts. Set in yellow gold with 16 old mine cut diamonds in platinum surround mounted surround of sapphire, band set w

3 days LeftFine Cabochon 12.5 CT Natural Sapphire & Diamond ring

$1,000

Mario Buccellati 18K Gold Diamond Bangle: Mario Buccellati (Italian, 1891-1965) 18K Gold Diamond Bangle, featuring the hand fabricated technique made famous by the House of Mario Buccellati, circa 1950s, adorned with 360 bead set single cut d

6 days LeftMario Buccellati 18K Gold Diamond Bangle

$10,000

14K Yellow Gold Emerald and White Enamel Art Deco Style Link Necklace, Total Emerald Wt.- 24.03: 14K Yellow Gold Emerald and White Enamel Art Deco Style Link Necklace, each of the 22 links with a graduated octagonal emerald atop a border of white enamel flanked by four round diamonds on each side

May 11, 202414K Yellow Gold Emerald and White Enamel Art Deco Style Link Necklace, Total Emerald Wt.- 24.03

$1,000

Platinum Oval Diamond Ring 3.01 Carats, GIA: Platinum Oval Diamond Ring 3.01 Carats, GIA certificate #2378195822, featuring one oval brilliant cut diamond, centered prong set, weighing 3.01 carats, D color, VS2 clarity, flanked by 4 baguette dia

6 days LeftPlatinum Oval Diamond Ring 3.01 Carats, GIA

$30,000

Madeleine Albright's Burlwood Standing Jewelry Box: Madeleine Albright's Burlwood Standing Jewelry Box In 2009, Secretary Albright published Read My Pins: Stories from a Diplomat’s Jewel Box, a book rich with photographs of her pins and text expl

May 07, 2024Madeleine Albright's Burlwood Standing Jewelry Box

$800

ETERNA-MATIC KonTiki 20 gents wristwatch 37 mm

Item Details

Description

ETERNA-MATIC KonTiki 20 gents wristwatch 37 mm with original Gay Freres bracelet, Switzerland around 1970, self winding, stainless steel case, original bracelet with deployant clasp, endlinks marked KH, screwed down case back with appropriate badge in 14k yellow gold, silvered dial with raised hour- indices, date, rhodium plated movement calibre 1489K, ball bearing rotor, diameter approx. 37 mm, length approx. 21 cm, signs of use, condition 2-3, property of a collector

Condition

Buyer's Premium

ETERNA-MATIC KonTiki 20 gents wristwatch 37 mm

Name: ETERNA-MATIC KonTiki 20 gents wristwatch 37 mm
SKU: 98957134
Price: 500 EUR
Availability: InStock

Estimate €450 - €900

See Sold Price

Starting Price €200

Sell a Similar Item

12 bidders are watching this item.

Shipping & Pickup Options

Item located in Mutterstadt, de

See Policy for Shipping

Payment

Henry's Auktionshaus AG

Mutterstadt, Germany

199 Reviews

4,880 Followers