Full Details

Name and Model Number Keuffel & Esser 1746 Mannheim
Country of Origin USA
Date of Manufacture 1899
Front Scales 10 inch / A [ B C ] D | 25cm
Back Scales Slide: [ S L T ] ; Conversion Table
Scale Length 10 (25 cm)
Type of Rule Slide Rule
Construction Celluloid on mahogany
Area of Use Generic
Comment Slide well has cm extension scale: 25 cm to 50 cm.
Scales are the old embellished "railroad track" style.
Rarity RR
Donor Collection of Dr. Paul J. Tarantolo Jr.
Match Number 33
(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.