| Name and Model Number | Morse Decimalizer |
| Country of Origin | USA |
| Date of Manufacture | c. 1940 |
| Front Scales | Special decimal keeping; no log scale |
| Back Scales | none |
| Scale Length | n/a |
| Type of Rule | Other |
| Construction | Bent steel with plastic slide & bent copper cursor. |
| Area of Use | Generic |
| Comment | This is not a calculating slide rule. It is a device to keep track of
the position of the decimal point during calculations with a slide rule. |
| Rarity | RR-RRR |
| Donor | Collection of Ed Chamberlain |
| Match Number | 174 |
| 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. |