17 washers

Made:
1929
maker:
Sherard Osborn Cowper-Coles
17 washers, outside diameter 25mm, internal diameter 12mm

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17 washers, outside diameter 25mm, internal diameter 12mm
Science Museum Group
© The Board of Trustees of the Science Museum

17 washers, outside diameter 25mm, internal diameter 12mm, sherardized by Cowper Coles in 1929.

Details

Category:
Metallurgy
Object Number:
2002-128
Materials:
steel (metal) and zinc (metal)
type:
sherardized washers
credit:
Mr. Peter Cowper-Coles.