Shutter for observing Aurora, H.O.5, on brass foot
Shutter for observing Aurora, H.O.5, on brass foot 4" diam. sliding pillar, wedge about 6 1/2" long, 3/4" wide, rack and pinion adjustment, scale in inches and 1/10 nod 0 to 65, vernier (unusual kind) and wooden case. Wooden velvet covered cap for eye end, brass view tube 8 1/2" long with sliding tube, extra brass end for glass
- Object Number:
- British Admiralty (Hydrographic Department)
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