Keuffel & Esser 4081-3
Slide Rules for this model:
Base
| Slide Rule ID | Manufacturer | Model Code | Lot Code |
|---|---|---|---|
| Keuffel & Esser | 4081-3 | 977558 | |
| Keuffel & Esser | 4081-3 | 303198 |
Slide Rules for this model:
| Slide Rule ID | Manufacturer | Model Code | Lot Code |
|---|---|---|---|
| Keuffel & Esser | 4081-3 | 977558 | |
| Keuffel & Esser | 4081-3 | 303198 |