| Name and Model Number | Pickett Model B1 |
| Country of Origin | Made in Japan, and marketed in the USA by Pickett |
| Date of Manufacture | Est. 1960-1970 |
| Front Scales | LL1- LL2- LL3- DF CF CIF CI C D LL3+ LL2+ LL1+ |
| Back Scales | LLO- L K A B S ST T C D Sq rt 1 Sq rt 2 LLO+ |
| Scale Length | 25 cm (10 inches) |
| Type of Rule | Slide Rule |
| Construction | ONLY PICKETT MADE OF WOOD - BAMBOO, polished aluminum end brackets metal framed cursor |
| Area of Use | Generic |
| Comment | The most beautiful Pickett made, other than Executive models. |
| Rarity | RR |
| Donor | Collection of Clay Castleberry |
| Match Number | 309
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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.
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