US-Metric Conversion Slide Chart
| Brand | National Education |
|---|---|
| Type | Slide rule |
| Release Date | ? |
| length | N/A |
| Serial Num. | N/A |
| Date code | N/A |
| Country of origin | USA |
Given to me by my father who found it in his garage.
| Brand | National Education |
|---|---|
| Type | Slide rule |
| Release Date | ? |
| length | N/A |
| Serial Num. | N/A |
| Date code | N/A |
| Country of origin | USA |
Given to me by my father who found it in his garage.
