American computational gauging rod and rule
- Made:
- 1870-1880 in United States
American computational gauging rod and rule, c. 1875, patented (US PatentNo.101,309) by Eli S. Prime in 1870.
American computational gauging rod and rule, c. 1875, patented (US PatentNo.101,309) by Eli S. Prime in 1870.