Callipers by H.gregory, c.1770
Gunners callipers, 6 inch by H.Gregory, brass 18th century. These callipers ere used for measuring the diameter of cannon balls, or by crossing the arms, the bore of a cannon..
- Currently on display in:
- Mathematics
- Year made :
- 1744-1800
- Inventory number :
- 1919-3
