| Name and Model Number | REWA 10 m Rechenwalze |
| Country of Origin | Germany |
| Date of Manufacture | c. 1910 |
| Front Scales | Cylindrical C & D scales in 50 sections |
| Back Scales | none |
| Scale Length | 10 m |
| Type of Rule | Cylinder |
| Construction | Varnished paper scales on metal cylinder (16-cm dia. x 37-cm long) and on metal vanes on a sliding cylindrical sleeve. Wood support stand & wood shell cover. |
| Area of Use | Generic |
| Comment | Similar to Daemen-Schmid 10 m Rechenwalze, but some details are different. May be a copy. Right end of cylinder marked: "A.H. Nitschke. Straupitz-Hirschberg in Schl." Only example known. Smaller 3-m REWA sold at Breker auction in 2007. The REWA brand is unknown to Heinz Joss, the Swiss specialist on cylindrical slide rules. REWA may be an abbreviation for REchenWAlze. |
| Rarity | RRRR |
| Donor | Collection of Ed Chamberlain |
| Match Number | 152 |
| 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. |