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

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Ready reckoner for bolts and screws

Details

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