Full Details

Name and Model Number Gilson Atlas
Calculator type II
Country of Origin USA
Date of Manufacture 1930
Front Scales 1 Circular scale and 1 long spiral scale
Back Scales None
Scale Length 63 cm and 1.524 m
Type of Rule Disc
Construction Aluminum covered with white celluloid enamel
Area of Use Generic
Comment Thirty (30) revolution spiral scale. No scale highlighting.
Rarity RR
Donor Collection of Ed Chamberlain
Match Number 167
(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.