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Artificial Horizon
anonymous, anonymous, anonymous, c. 1830 - c. 1865, measuring instrument, NG-MC-1031
Het Amsterdams peil
anonymous, c. 1400 - c. 1950, measuring instrument, BK-KOG-1498
anonymous, anonymous, anonymous, c. 1830 - c. 1865, measuring instrument, NG-MC-1031
anonymous, c. 1400 - c. 1950, measuring instrument, BK-KOG-1498