Two discs, 40mm diameter

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Two discs, 40mm diameter
Science Museum Group
© The Board of Trustees of the Science Museum

Two discs, 40mm diameter, one sherardized by Cowper Coles in the 1920s.

Details

Category:
Metallurgy
Object Number:
2002-181
Materials:
steel (metal) and zinc (metal)
Measurements:
: x 1.5748 in.; x 40 mm
type:
two discs
credit:
Mr. Peter Cowper-Coles.