Ready reckoner for bolts and screws

Ready reckoner for bolts and screws

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Ready reckoner for bolts and screws
Science Museum Group
© The Board of Trustees of the Science Museum

Ready reckoner for bolts and screws, rectangular card with sliding section, made for the Societe Anonyme Gilsoco, Belgium by Normus

Details

Category:
Mathematics
Object Number:
1989-606
type:
ready reckoner (engineering)
credit:
Auction Team Koln