![]() ![]() The estimate of 25,000 total production is mine.) Hans Seeger’s excellent book, “Military Binoculars and Telescopes for Land, Air and Sea Service (3rd Edition 2005)”. (Note: the above information is thanks to a Google Translation of Dr. ![]() Thus, in 1943 the numbering of U-Boat binoculars began at 38300 to end at approximately 69150 in 1945. Although the numbering of the first type runs from about 2108901 to 2194600, in 1943 a low serial number range for U-Boat 7X50 and other type binoculars was begun (while many other binoculars continued to be made in the high number range!). The serial numbering of these binoculars is unusual and not consistent. Total manufacture of all types was probably between 16,540 to 25,000. The first type is the rarest many being lost during service use, and the third type is the most common. The third was made from 1943-1945 and is identical to the second except for having a larger diameter eyelens. The second was made probably only in 1943 and had rubber armor without fold-back eyecups. The first was made from 1941-1943, lacked rubber armor and had hinged fold-back Bakelite eyecups. Most were made by Zeiss but a smaller number were also manufactured by Emil Busch Rathenow (wartime code “cxn”). The U-Boat 7X50 was manufactured from 1941 – 1945 specifically for use aboard submarines and was officially designated as the “Doppelfernrohr 7X50 für U-Boote ‘U-Bootglas 7X50’”. “blc” is the German wartime code for the manufacturer, Carl Zeiss Jena. Notes: The only markings on this binocular are “7X50” over “61370” over “blc” on the right prism plate underneath the rubber armor. Manufacturer/Model: Carl Zeiss Jena blc U-Boat 3rd model 7X50įield of View: 7.3 deg = 128 m/1,000 m APFOV 51 deg Carl Zeiss Jena blc U-Boat 3rd model 7X50 (View 1) ![]()
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