| Name and Model Number | Scientifiic Instrument Company Model 1610 D |
| Country of Origin | USA / Japan |
| Date of Manufacture | 1972 |
| Front Scales | LL3 LL2 LL1 LL0 K A D C CI B E1 |
| Back Scales | LL3 LL2 LL1 LL0 P L DI D C |
| Scale Length | 37 cm (14.75 inches) for longest scale |
| Type of Rule | Disc |
| Construction | Plastic, circular construction with separate cursors for each side and a separate inner sliding disk for each side. |
| Area of Use | Generic |
| Comment | Used for logarithmic and trigonometric calculations. A very complex circular slide rule. This company was also known by the initials SIC.
|
| Rarity | RR |
| Donor | Collection of Clay Castleberry |
| Match Number | 368 |
| 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. |