TWO VOLTMETERS

Description

TWO VOLTMETERS
1) Circa 1900 Weston Voltmeter by Weston Electrical Instrument Company, Newark, New Jersey. Serial #54289. Diameter 7.75". Depth 4.5".
2) Cased pocket voltmeter by Peto & Radford, Ltd., France. Diameter 2.375".

Condition

Total weight 10.5 pounds

The absence of a condition report does not imply an object is free of defects. All items may have normal signs of age and wear commensurate with their age; these issues will likely not be mentioned in the condition report. Please contact Eldred's before the auction with any condition questions. Questions about condition will not be answered after purchase. Condition reports are provided as a courtesy, and we are not responsible for any errors or omissions. Important note on frames: Frames are not guaranteed to be in the same condition as they are in the item photograph. Due to handling and shipping, many frames, especially antique ones, are prone to losses. If you have questions about the condition of a frame, please contact us prior to the auction.

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TWO VOLTMETERS

Lot 9116

Estimate $100-$200Mar 12, 2026, 9:30 AM EDT

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The Harvey P. Greenspan Collection of Science

Mar 12, 2026 9:30 AM EDT

Hanover, MA, United States

TWO THERMOPILE DEVICES Late 19th Century Heights 8.5" and 9".: TWO THERMOPILE DEVICES Late 19th Century Used to convert thermal energy into electrical energy.?Both unmarked, although the larger is believed to be a Melloni Thermopile Professional Model. Both

Mar 12, 2026TWO THERMOPILE DEVICES Late 19th Century Heights 8.5" and 9".

FOUR ELECTRICAL METERS/SWITCHES Late 19th/Early 20th Century: FOUR ELECTRICAL METERS/SWITCHES Late 19th/Early 20th Century 1) Ampere shunt for a Weston Standard milli-voltmeter. Height 4.5". Length 6". Width 6.5". 2) Printer radial arm rheostat by Western Union

Mar 12, 2026FOUR ELECTRICAL METERS/SWITCHES Late 19th/Early 20th Century

CASED WESTON ELECTRICAL INSTRUMENT CO. DIRECT-READING AMMETER Newark, New Jersey, Late 19th Century: CASED WESTON ELECTRICAL INSTRUMENT CO. DIRECT-READING AMMETER Newark, New Jersey, Late 19th Century Marked on plaque "Weston Electrical Instrument Co. Newark, N.J., U.S.A. Patented Nov. 6th 1888 No.

Mar 12, 2026CASED WESTON ELECTRICAL INSTRUMENT CO. DIRECT-READING AMMETER Newark, New Jersey, Late 19th Century

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Mar 12, 2026TWO SMALL ELECTRIC METERS Late 19th Century

EDISON HOME PHONOGRAPH WITH MODEL C REPEATER New Jersey, Early 20th Century Horn length 10".: EDISON HOME PHONOGRAPH WITH MODEL C REPEATER New Jersey, Early 20th Century Serial #237602. Zinc-plated horn. Takes a 4.5" cylinder. Horn length 10". Diameter 5". Case height 12" (not including

Mar 12, 2026EDISON HOME PHONOGRAPH WITH MODEL C REPEATER New Jersey, Early 20th Century Horn length 10".

COLUMBIA TYPE B CYLINDER GRAPHOPHONE New York, Late 19th Century Case height 6.5" (not including: COLUMBIA TYPE B CYLINDER GRAPHOPHONE New York, Late 19th Century Serial #421295. Nicely labeled on side of the domed oak case. Labeled on interior "Columbia Phonograph Co., Sole Sales Agent for

Mar 12, 2026COLUMBIA TYPE B CYLINDER GRAPHOPHONE New York, Late 19th Century Case height 6.5" (not including

RARE CHARLES T. CHESTER MORSE TELEGRAPH EMBOSSING REGISTER New York, Circa 1856-1858 Height 7.25".: RARE CHARLES T. CHESTER MORSE TELEGRAPH EMBOSSING REGISTER New York, Circa 1856-1858 Retains removable turning key. Stamped maker's mark. Height 7.25". Length 12.25". Width 5.25" (not including key).

Mar 12, 2026RARE CHARLES T. CHESTER MORSE TELEGRAPH EMBOSSING REGISTER New York, Circa 1856-1858 Height 7.25".

RARE RUHMKORFF ALPHABET DIAL TELEGRAPH France, 19th Century Height 12". Dial diameter approx. 8.5".: Y Y RARE RUHMKORFF ALPHABET DIAL TELEGRAPH France, 19th Century Small ivory knob on dial hand. Marked on dial "Ruhmkorff a Paris". Mounted on a mahogany base. Height 12". Dial diameter approx. 8.5".

Mar 12, 2026RARE RUHMKORFF ALPHABET DIAL TELEGRAPH France, 19th Century Height 12". Dial diameter approx. 8.5".

RARE RUHMKORFF ALPHABET DIAL TELEGRAPH France, 19th Century Height 12". Dial diameter approx. 8.5".: RARE RUHMKORFF ALPHABET DIAL TELEGRAPH France, 19th Century Marked on dial "Ruhmkorff a Paris". Mounted on a mahogany base. Height 12". Dial diameter approx. 8.5".

Mar 12, 2026RARE RUHMKORFF ALPHABET DIAL TELEGRAPH France, 19th Century Height 12". Dial diameter approx. 8.5".

WHEATSTONE TELEGRAPH SYSTEM TRANSMITTER AND RECEIVER England and Copenhagen, Late 19th Century: WHEATSTONE TELEGRAPH SYSTEM TRANSMITTER AND RECEIVER England and Copenhagen, Late 19th Century Transmitter engraved on top "G.P.O.", likely from post office use. Receiver engraved "St. N.T.S's Fabrik

Mar 12, 2026WHEATSTONE TELEGRAPH SYSTEM TRANSMITTER AND RECEIVER England and Copenhagen, Late 19th Century

EARLY RELIEF WRITER (TELEGRAPH RECORDER) BY JOHANN MICHAEL EKLING Austria, Circa 1866 Height 15.25".: EARLY RELIEF WRITER (TELEGRAPH RECORDER) BY JOHANN MICHAEL EKLING Austria, Circa 1866 Marked "K.K.T.W. No 205" (Kaiserlich K?nigliche Telegraphen Werkst?tte). Mounted on a wood base. Height 15.25".

Mar 12, 2026EARLY RELIEF WRITER (TELEGRAPH RECORDER) BY JOHANN MICHAEL EKLING Austria, Circa 1866 Height 15.25".

RARE COMPLETE ROBERT DROSTEN TELEGRAPH Brussels, Early 20th Century Case heights 7". Lengths 13.5".: RARE COMPLETE ROBERT DROSTEN TELEGRAPH Brussels, Early 20th Century Includes sender and receiver. Set within handled wooden cases. Case heights 7". Lengths 13.5". Widths 8.5".

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COHERER WIRELESS RECEIVER BY A. KLIENIK Bonn, Germany, Late 19th/Early 20th Century Height 6.75".: COHERER WIRELESS RECEIVER BY A. KLIENIK Bonn, Germany, Late 19th/Early 20th Century Primitive form of radio signal detector used in the first radio receivers during the wireless telegraphy era of the

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CHARLES HULSMEYER-TYPE COHERER RECEIVER Germany, Early 20th Century Height 7". Width 15.75". Depth: CHARLES HULSMEYER-TYPE COHERER RECEIVER Germany, Early 20th Century Marked on brass plaque for retailer or manufacturer "Paul Schultze Kothen-Anh". Height 7". Width 15.75". Depth 7". Notes:

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JOUSELLIN INDICATOR DIAL TELEGRAPH FOR RAILROAD USE France, Late 19th Century Height 13". Width: JOUSELLIN INDICATOR DIAL TELEGRAPH FOR RAILROAD USE France, Late 19th Century Simple dial telegraph for use between two or three local rail stations. Can convey up to 20 short fixed messages (i.e.,

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EMILE BAUDOT PRINTING TELEGRAPH BY J. CARPENTIER Paris, Mid- to Late 19th Century Height 10.5".: EMILE BAUDOT PRINTING TELEGRAPH BY J. CARPENTIER Paris, Mid- to Late 19th Century Marked on the brass housing "J. Carpentier Ingr Constr Paris" and "3074 R 35". Height 10.5". Width 11.5". Depth 7.5".

Mar 12, 2026EMILE BAUDOT PRINTING TELEGRAPH BY J. CARPENTIER Paris, Mid- to Late 19th Century Height 10.5".

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Mar 12, 2026TWO-PART GAMEWELL CO. PRINTING TELEGRAPH FOR FIRE ALARM SYSTEMS Newton, Massachusetts, Late

GAMEWELL CO. FIRE ALARM TELEGRAPH UPRIGHT CALL BELL New York and Newton, Massachusetts, Late 19th: GAMEWELL CO. FIRE ALARM TELEGRAPH UPRIGHT CALL BELL New York and Newton, Massachusetts, Late 19th Century Sometimes referred to as an "umbrella bell" or a "tapper bell". Serial #48613. Slate base.

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