| Name and Model Number | Pickett 52T U.S. Air Force Photo S.R. |
| Country of Origin | USA |
| Date of Manufacture | Est. End of Korean War |
| Front Scales | L. A, DF,CF,CIF, T, S,C, D, DI, K |
| Back Scales | Ground size, Image size, Focal length, Altitude |
| Scale Length | 25 cm |
| Type of Rule | Slide Rule |
| Construction | Aluminum with plastic cursor |
| Area of Use | Photography |
| Comment | Photo reconnaissance calculations |
| Rarity | RR |
| Donor | Collection of Clay Castleberry - California USA |
| Match Number | 279 |
| 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. |