Rolling rule for typewriter spacing
This image is released under a CC BY-NC-SA 4.0
Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseRolling rule for typewriter spacing, French patent
Science Museum Group
© The Board of Trustees of the Science Museum
Rolling rule for typewriter spacing, French patent, by Exa-Corona
Details
- Category:
- Mathematics
- Object Number:
- 1990-684
- type:
- rules (drawing) and rolling parallel rules
- credit:
- Auction Team Koln
