Tangent Sight, anonymous, 1860 - 1870 demonstration model. test model A short set -up rod, consisting of a square iron rod with pyramid -shaped top where grooves cross. A bowl is applied to one side, ranging from 0 to 18: the distance between the numbers is exactly 1 cm. These and NG-MC-1889-29-A both fit in support NG-MC-1374. Netherlands iron (metal)

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Size: 6496px × 4872px
Photo credit: © piemags/rmn / Alamy / Afripics
License: Licensed
Model Released: No

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