This is due to some dullness in the image produced, likely also as a result of wear to the objective lens coatings - a common issue with the seemingly less durable rose coloured coating material that was chosen for use later in the war. Both sides remain in collimation. Overall, a pair which still remains as a superb, displayable example of a highly prized and iconic artefact from the infamous U-boat arm of the Kriegsmarine naval forces! Many thanks for looking and please feel free to check out our other WWII German optics, accessories etc. The item "WWII German Carl Zeiss Jena 7x50 Kriegsmarine U-boat Binoculars BLC Original WW2" is in sale since Monday, April 5, 2021.This item is in the category "Collectables\Militaria\World War II (1939-1945)\Field Gear". The seller is "pjem218" and is located in Wakefield, West Yorkshire. This item can be shipped to North, South, or Latin America, all countries in Europe, all countries in continental Asia, Australia.