| Name and Model Number | Keuffel & Esser Graphical Firing Table M16 |
| Country of Origin | USA |
| Date of Manufacture | 1943 |
| Front Scales | Yard shift, 33 1/3 yards, range, sin, sin , sin, C, D, -- scale up to 20,000 yards on upper bevel |
| Back Scales | Back of slider Cos 1, Cos 2, Cos plus – instructions on back of rule. |
| Scale Length | 40 cm (16 inches) |
| Type of Rule | Slide Rule |
| Construction | Mahogany back +– adjustable body –front with painted surface, boxwood glued to a mahogany back – unusual construction |
| Area of Use | Military |
| Comment | Used for aiming artillery in WWII. Well made mahogany slide rule - Cursor missing |
| Rarity | RR |
| Donor | Collection of Clay Castleberry |
| Match Number | 365 |
| 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. |