An Everard-type Excise Officer's Slide Rule,

English, c. 1830, four-slide boxwood Imperial measure slide rule by Laban Cook, the stock stamped 'Cook Maker to the Honble Board of Excise, Late Wellington, Crown Court, Soho London No. 5026', upper

Five (5) early calculators or slide rulers, including one (1) G. Small Pocket Calculator, Roberts Everard type box rule, G. Charpentier Calculimetre, Sexton's Omnimetre Circular Slide Rule, and one (1

English, c.1921-1923, number 7870 (no preceeding letter) in nickel plate with white on black scales, cursor a single tube with index marks in the form of arrows, no address on scales, in fitted velvet

circa 1940. circular slide rule type device used in fixing navigation points at sea. L11" Note: Writing on fitted box includes "German Submarine U865". U-865 was launched July 12, 1943 and went missin

A near mint condition 10" Pickett Model N4-ES Vector-Type Log Log Dual-Base Speed Rule, complete in box with leather case and strap. Dated 1959. *note - box is marked Model N4-T

Group of 4 vintage Dietzgen slide rules. Includes a 1942 1768P Reliance with original case, box and instruction booklet, a 1950 Maniphase Multiplex Decimal Trig Type Log Log Rule no. 1732 in original

A mixed lot of four vintage German slide rules, including: one Dietzgen N1733 Polymath Multiplex Delcimal Trig Type Log Log, one Weber #4281, one Nestler Mercur Nr. 0401, and one Reiss Reitz in all me

Master Slide Ruler - Type of boxwood ruler, featuring the sliding extensions,The slides are linked by brass guides and spring clips that hold the ruler opened, or release the rule with a slight finger

Filotecnica Model 201 Back-Light Screen Projection Slide Rule, Italy c. 1955 In the early 1950s the company Filotecnica Salmoiraghi, well known for its precision equipment, developed a slide rule that

Rule

English, c. 1820, in boxwood and brass, double sided with numerous finely divided logarithmic scales and early form of cursor, time side with scales marked Half Sum, Lat, Diff, Time PM, Time AM, cu gr

Keuffel & Esser (K&E) 4090 universal slide rule, PN 19-19-19-19-19-19. Marked "Keuffel & Esser Co. N.Y., Pat. Oct. 6, 1891". Comprised of two-sided white celluloid coated mahogany, black metal framed

Ten (10) Keuffel & Esser (K&E) Slide Rules. 1st item: K&E 4061 Polyphase Duplex slide rule. Comprised of two-sided celluloid coated mahogany, with frameless glass cursor with plastic edges held togeth

A Rare Slide Rule Snuff Box, French, early 19th century, the tortoiseshell and bois durci circular box with ivorine veneer scale, the top and base with moulded relief scenes of the Louvre and Pont de

In Box with Case and Book.

The Breitling Navitimer was the evolution of the 1942 Breitling Chronomat, with its typical slide rule bezel which was used to calculate complicated operations without the help of additional tools. Br

BREITLING - a gentleman's Navitimer 92 chronograph bracelet watch. 18ct yellow gold case with slide rule bezel. Reference K30022, serial 0042. Signed automatic calibre B30. Blue dial with luminous Ara

BREITLING - a limited edition gentleman's Navitimer Montbrilliant chronograph wrist watch. Number 19 of 25. Platinum case with inner slide rule bezel. Numbered L30030.1. Signed automatic movement. Bla

Black Dial with Silver Outer Scale Black Subdials Luminescent Hands Index Hour Markers Subsidiary Second Hand.Chronograph Functions Bi-Directional Rotating Slide Rule Bezel 2nd Time Zone GMT hand Date

Breitling Navitimer 806, early steel version circa 1956, manual winding caliber Venus 178, black dial with luminous numerals, slide rule function, movement running, black leather strap with pin buckle

BREITLING - a gentleman's Breitling for Bentley Motor Speed chronograph bracelet watch. Stainless steel case with slide rule bezel. Reference A25364, serial 2397742. Signed automatic calibre B25B with

Fantastic condition stainless steel Breitling 806 chronograph watch with the manual Venus 178 Movement. 41mm stainless steel case with angled lugs, bi-directional slide-rule bezel, Breitling logo on c

BREITLING - a gentleman's Breitling For Bentley 6.75 chronograph wrist watch. Stainless steel case with slide rule bezel. Reference A44362, serial 2017128. Signed automatic calibre B44B with quick dat

BREITLING - a gentleman's Navitimer 806 chronograph wrist watch. Stainless steel case with slide rule bezel. Reference 806, serial 994118. Signed manual wind Venus calibre 178 (WOG). Black dial with b