| Name and Model Number | Billeter, Julius Rechenwalze - 4 m |
| Country of Origin | Switzerland |
| Date of Manufacture | c. 1900 |
| Front Scales | 20 - section C & D scales |
| Back Scales | NONE |
| Scale Length | 4-m |
| Type of Rule | Cylinder |
| Construction | Varnished paper scales on 5-cm dia. metal cylinder and on metal vanes on a sliding cylindrical sleeve. Wood support stand. |
| Area of Use | Financial |
| Comment | This is an early example matching Billeter's 1894 patent. Later examples carry "National Rechenwalze - System Billeter" |
| Rarity | RRR |
| Donor | Collection of Ed Chamberlain |
| Match Number | 114 |
| 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. |