| Name and Model Number | Dennert & Pape Model #1 with chisel cursor |
| Country of Origin | Germany |
| Date of Manufacture | 1890 |
| Front Scales | A, B, C, & D scales |
| Back Scales | S, L, & T on reverse of slide |
| Scale Length | 25-cm |
| Type of Rule | Slide Rule |
| Construction | Mahogany wood with celluloid scale surfaces |
| Area of Use | Generic |
| Comment | Mannheim style slide rule. Dennert & Pape Altona Patent in well beneath the slide. Has two sided brass chisel cursor. Inch scale on beveled edge, cm scale on the other edge surface. May have had tables of constants on reverse. |
| Rarity | RRR |
| Donor | Collection of Ed Chamberlain |
| Match Number | 118 |
| 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. |