| 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 |
| Thumbnail (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. |