This is the 7 x 50 binocular Dr Caroline Bleeker designed for the Royal Dutch Navy (KM= Koninklijke Marine) at the Zeist factory in the 1950's. It's a superb binocular, even today it can compete with modern high class binoculars. On the left side there is an engraving of the Royal Dutch Navy ( a "K" and a "M" divided by an crowned anchor) and the number cl.nr 5188.8.131.52. On the right side you find "Dr. C.E.Bleeker Zeist Ibunox 7 x 50". On the left bridge to the front, there is the serial # 23717.
On the left bridge to the front, there is the serial # 23717.
The reticle is on the right side.