| All returns accepted | ReturnsNotAccepted |
|---|---|
| Country/Region of Manufacture | United States |
| Advertising | For Tenney Engineering Inc |
Check the listing for details. Vintage 1974 Perrygraf Temperature & Relative Humidity Conversion Slide Rule. Condition: Used. Listed at 12.99 USD. Vintage 1974 Perrygraf Temperature & Relative Humidity Conversion Slide Rule Advertising for Tenney Engineering Inc Has wear, scuffs and discoloration. See pictures.