Keuffel & Esser Log Log Duplex Decitrig
Models in this series:
| Slide Rule ID | Model | Lot Code |
|---|---|---|
Model 4081-3 | ||
| 4081-3 | 977558 | |
| 4081-3 | 303198 | |
Model N4081-3 | ||
| N4081-3 | ||
Models in this series:
| Slide Rule ID | Model | Lot Code |
|---|---|---|
Model 4081-3 | ||
| 4081-3 | 977558 | |
| 4081-3 | 303198 | |
Model N4081-3 | ||
| N4081-3 | ||