Full Details

Name and Model Number Military Slide Rule
Keuffel & Esser 4108
Country of Origin USA
Date of Manufacture 1946 from serial number
Front Scales Opposite angle [ Apex angle CI C ] D A
Back Scales [Sin Sin-Tan Sin C ]
Scale Length 25 cm
Type of Rule Slide Rule
Construction Closed frame mahogany body with celluloid laminate scale surfaces.
Area of Use Military
Comment This rule does not appear in K&E catalogs. This rule is one of a set of three that were contracted by the US Military. The other two were by American Blueprint Co. (K&E made the rule for American Blueprint Co. and labeled it for them) and Pickett with only slight variations.
Rarity RRR
Donor Collection of Clark McCoy
Match Number 224
(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.