PILOT'S SUPER PLOTTER, SLIDE RULE, GEOMETRY DEVICES

Here is a large lot of important devices for pilots and mathematicians....including......Deci-lon Slide Rule ($64 used).....DorCliff Super Plotter for pilots--pilots know that a plotter left in the su

Pre-Owned Citizen Nighthawk Eco-Drive Men's Watch in Black. Stainless steel watch featuring date window at three o’clock position, dual-time display, and pilot's slide rule inner chapter ring op

Includes Zeno Watch Basel Pilot Oversized Slide Rule Chrono Ref# 8557 & Zeno Watch Basel Ref# 4557. Both watches appear to properly function and are in very nice condition. Both include original boxes

Promaster collection men's Citizen Eco Drive Pilot Aviator style wrist watch with synchronized time adjustment available in 27 cities. Pilot's rotating slide rule bezel, chronograph, perpetual calenda

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

Including a Keuffel slide rule, Borg Warner slide rule, a Roller Rule pencil "the pencil with a brain", and other measuring devices.

Collection of 50+ Vintage Slide Rule Plotter Protractor. Many housed in attractive colored sheaths or holsters, and some including box. A variety of calculations can be made with these mechanical anal

Antique vintage group of various statistical and computation devices and tools. Includes: Weiss Slide Rule in carboard printed wheel by C.H. Stoelting circa 1950 Correlation and Machine Calculation bo

4 Military Calculating Devices 1) Measurement triangle by Gebrüder Haff, Pfronten, Bavaria; for determining the distance of hostile artillery. - 2) English slide rule, for height/angle calculati

The manual is copyright 1891 so the slide rule is potentially 1890s. This is a very early version of one of the most scientific computing devices.Date: Country (if not USA): State: City: Provenance:

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

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