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Object details
| ID: | ACO0655.4 |
|---|---|
| Type: | Pienmen nephoscope box key |
| Display location: | Not on display |
| Creator: | Unknown |
| Date made: | Unknown |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 6 mm x 32 mm x 14 mm |