Gunnery callipers, French, 17th century.
3 4 c m
40cm
actual image size: 32cm x 26cm

Gunnery callipers, French, 17th century.

© Science Museum / Science & Society Picture Library

Description

Callipers were used to measure the diameter of cannon balls and the bores of cannons. This example also incorporated scales for artillery calculations.
 

Image Ref.

10328301
 

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