| Name and Model Number | Gilson Midget Type 1, Version 1 |
| Country of Origin | USA |
| Date of Manufacture | c. 1915 |
| Front Scales | C, L |
| Back Scales | Sin/Cos Degrees Tan/Cot |
| Scale Length | 10” (25 cm) |
| Type of Rule | Disc |
| Construction | Varnished paper scales on plywood with metal cursors. |
| Area of Use | Generic |
| Comment | Type I - Version I (after Aldinger and Chamberlain,
The Gilson Slide Rules - Part I - The Small Rules, JOS:9.1) |
| Rarity | RRR |
| Donor | Collection of Dr. Paul J. Tarantolo Jr. |
| Match Number | 29 |
| 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. |