Observation binoculars – 10×45 US Navy model Optical Shop Annex Rochester NY USA – 1920-1930 – Verenigde Staten – Bureau of navigation US Naval Gun Factory –
On auction , this US Navy 10x45 binoculars . Marked on the left side : Bureau of navigation - 10x45 US Navy . On the right side : US Naval Gun Factory - Optical Shop Annex Rochester NY USA .This pair is in fair condition .Inside a little dirt , columation could be better. Orange filters inside the eyecups .Image is still sharp and reasonable clear .It has a unusual shape with a kind of porro prisms . Model is heavy and weights a 1213 grams . Sliding sunshades , and a central focus system .Folding it for the eye distance is a bit stif . Diopter in the right side .There are little screws in the top side for adjusting the prisms .Please see all pictures as they are part of the description.
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