Vernier External Callipers, 1800-1825

Made:
1800-1825 in London
maker:
Holtzapffel and Company

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Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Vernier external callipers, by Holtzapffel and Co., London. (Indirect reading) triangular pattern, with sliding vernier scale, giving magnification of 3.8 to 1 reading up to 0.7 inch and to 0.001 inch adjustment, 1800-1825

Details

Category:
Industrial Metrology
Object Number:
1930-172
type:
callipers
taxonomy:
  • furnishing and equipment
  • measuring device - instrument
credit:
Lt. James F. Godwin