Full Details

Name and Model Number Keuffel and Esser 4088-2
8" Scales, Column Cursor
Country of Origin USA
Date of Manufacture 1913
Front Scales DF [ CF CIF C ] D
Back Scales K A [ S T CI ] D L
Scale Length 8" (20 cm)
Type of Rule Slide Rule
Construction Celluloid on mahogany
Area of Use Generic
Rarity RR
Donor Collection of Clay Castleberry
Match Number 260
(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.