Full Details

Name and Model Number Dumesnil Régle
Universelle Deposée
Country of Origin France
Date of Manufacture c. 1900
Front Scales First four sections of 8-sect. graphical C & L scales
Back Scales Last four sections of 8-sect. graphical C & L scales, beveled edge has a cm scale
Scale Length 2-meters in 8 sections
Type of Rule Slide Rule
Construction 29.2-cm x 4.9-cm boxwood rule with paper scale surfaces
Area of Use Generic
Comment Requires dividers to make calculations. Won "Médaille a l'Exposition" at 1900 World's Fair. Sometimes has card stock case. I have also seen one in a decorated copper case.
Rarity RR
Donor Collection of Ed Chamberlain
Match Number 139
(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.