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▾ Collection
- National Maritime Museum Manuscripts (2)
- Papers of the Board of Longitude (4)
- Royal Greenwich Observatory Archives (6)
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▾ Subject
- Navigational aids (3)
- ASTRONOMY (2)
- Time Measuring Instruments (2)
- Horology (1)
- Longitude (1)
- Marine navigation (1)
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▾ Date
- 1700s C.E. (6)