Station keeper

Station keeper, one of three, Bells form H.O Station keeper (optical range-finder)

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Station keeper, one of three, Bells form H.O
Science Museum Group
© The Board of Trustees of the Science Musuem

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Station keeper, one of three, Bells form H.O., a small angle prism (marked 32') set in wooden mount with handle 3 1/2" long, 1853-1921

Details

Category:
Navigation
Object Number:
1911-172/3
Materials:
wood (unidentified) and glass
Measurements:
overall: 90 mm x 25 mm x 9 mm, 10g
type:
optical range-finder