Full Details

Name and Model Number Keuffel & Esser
Graphical Firing Table M16
Country of Origin USA
Date of Manufacture 1943
Front Scales Yard shift, 33 1/3 yards, range, sin, sin , sin, C, D, -- scale up to 20,000 yards on upper bevel
Back Scales Back of slider Cos 1, Cos 2, Cos plus – instructions on back of rule.
Scale Length 40 cm (16 inches)
Type of Rule Slide Rule
Construction Mahogany back +– adjustable body –front with painted surface, boxwood glued to a mahogany back – unusual construction
Area of Use Military
Comment Used for aiming artillery in WWII. Well made mahogany slide rule - Cursor missing
Rarity RR
Donor Collection of Clay Castleberry
Match Number 365
(Click Picture for Details)

In conjunction with our 'donors' we assign a rarity rating to each item, based on the system devised by Herman van Herwijnen
(1929 - 2004), renowned Dutch collector, author, and creator of Herman's Archive, a collection of 5,000 slide rule images on CD.
• RR = Rare - 1 of 25 collectors has one; it may take a year to find an example in the marketplace.
• RRR = Very Rare - only a few known to collectors; may be several years before it comes up for sale.
• RRRR = Extremely Rare - a museum piece; unlikely that an example will come up for sale.