Seems like we have a wealth of knowledge on many subjects here and this may not be the right place to post but here ya go ! This thing appears to be some kinda optical plumb bob and I cannot find any data on it. Hoping someone here used one and can tell me wth it is . It was sitting next to a dumpster so whoever had it couldn't make themselves toss it in !
The scope is fairly high magnification and the image seen is inverted.
Made by Bendix Aviation , some guessed it's a bombsight but I think not.