| Name and Model Number | Dietzgen Multiplex-Mack Model 1762B |
| Country of Origin | USA (Germany) |
| Date of Manufacture | c. 1905 |
| Front Scales | A, B, C, & D scales |
| Back Scales | S, L, & T on reverse of slide, K on lower edge, Inch scale on beveled edge |
| Scale Length | 25-cm |
| Type of Rule | Slide Rule |
| Construction | Mahogany wood with celluloid scale surfaces |
| Area of Use | Generic |
| Comment | Has a bi-directional "Multiplex" scale in the B scale position. Patent June 28, 1898 in well beneath slide is for "Mack" slide pressure mechanism. Matal framed cursor. Tables of engineering constants on reverse. Stamped 3379A on back, but Model #1762B on case corresponds with Dietzgen catalog number. |
| Rarity | RR |
| Donor | Collection of Ed Chamberlain |
| Match Number | 119 |
| 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. |