| Name and Model Number | Tyler by Weems and Plath |
| Country of Origin | U.S.A. |
| Date of Manufacture | |
| Front Scales | L,C,A,S,T,S2,T2,ln |
| Back Scales | None |
| Scale Length | 19 cm diameter |
| Type of Rule | Slide Rule |
| Construction | Plastic |
| Area of Use | Generic |
| Comment | An interesting log spiral scale. |
| Rarity | RR |
| Donor | Collection of Rod Lovett |
| Match Number | 29 |
| Thumbnail |  |
| RR | = Rare -- 1 of 25 collectors has one; it may take a year to find an example in the marketplace. |
| RRR | = Very rare -- only very few known to collectors; may take several years before one comes up for sale. |
| RRRR | = Extremely rare -- a museum piece; unlikely that an example will ever come up for sale. |