Three card slide rule ready reckoners by Omaro, Paris: transmission drive calculator, model I.1 (1935); gear-tooth ready reckoner, model T.3 (1932); mild steel ready reckoner, model P.12 (1935)
Details
- Category:
- Mathematics
- Object Number:
- 1989-607
- type:
- ready reckoner
- credit:
- Auction Team Koln
