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Keuffel & Esser 4080-3 - Notes
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- I believe that this rule probably dates from roughly 1946 or 1947, the serial number is about right for that date and
and the revised model with all the details on the edge was introduced in 1949. For K&E serial number dating use the link here to
Ed Chamberlain's reference set of dating curves.
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Details
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Further details about this Slide Rule:
| Brand |
Keuffel & Esser |
| Model |
4080-3 Log Log Duplex Trig |
| Country of Manufacture |
USA |
| Scales Front |
L, LL1, DF [CF, CIF, CI,
C] D, LL3, LL2 |
| Scales Back |
LL0, LL00, A [B, T, ST, S] D, DI, K |
| Number of Scales |
20 |
| Slide Rule Materials |
Wood/Celluloid |
| Cursor Materials |
Metal/Glass |
| Cursor Lines |
1 Front, 1 Back |
| Scale Length |
25 cm |
| Length |
31.7 cm |
| Width |
4 cm |
| Condition |
Good |
| Documentation |
None |
| Accessories |
- Leather and composite case
- Original box
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