Full Details

Name and Model Number French Homemade
Cylindrical Slide Rule
Country of Origin France
Date of Manufacture ??
Front Scales  
Back Scales  
Scale Length 1-meter
Type of Rule Cylinder
Construction Wood with paper & cardstock scales
Area of Use Generic
Comment Purchased from French eBayer
Rarity RRRR
Donor Collection of Ed Chamberlain
Match Number 141
(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.