As for the logos' position on the scope I can't find any photos. If there ever was any logo there?
Couldn't it have been just a rubber 'ring' on the eyepiece?
Even if we want everything as authentic as possible - does the position really matter?
Here are some examples of logos on German WWII binoculars.
Carl Zeiss Jena 8x30 Military WWII Binoculars
8x60 U.BOAT "COMMANDERS GLASS" BINOCULARS - CARL ZEISS
unique to Kriegsmarine binoculars
Kriegsmarine Binos
Some type VII interior pics