Beam compass, metal frame marked "HO ^ 8", length
Beam compass, metal frame marked "HO ^ 8", length of frame 2' 6 1/2",width 4", arm divided on silver to 1/20", reading by vernier to 1/1000", clamp and screw motion, with screw adjustment for pencil
- Object Number:
- British Admiralty (Hydrographic Department)
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