Three card slide rule ready reckoners by Omaro, Pa

Made:
1935-1939 in Paris

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
status:
Permanent collection

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