ball bearing races

Four ball bearing races

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Four ball bearing races
Science Museum Group
© The Board of Trustees of the Science Museum

Four ball bearing races, for regulator timepiece employing Grimthorpe's four-legged gravity escapement, by A. V. Parlby, British, 1937

Details

Category:
Time Measurement
Object Number:
1962-47/2
type:
ball bearing races
credit:
Parlby, A.V.