i recently picked up an old pair of Hensoldt Wetzlar binoculars, these are German military issue from WWII. The glass is pretty incredible even though they are 50 plus years old. They are missing the original eyecup and objective rubber covers. I plan on hunting with these binos. Anybody have some good ideas for making some kind of covers for the exterior glass to keep out the elements? Any help would be greatly appreciated. Thanks and have a Merry Christmas.