Original Item: One-of-a-kind. Genuine Russian cold war period produced optical sight (Gertz system) for a 57mm and 76mm antitank gun. Nicely stamped with hammer and sickle, various Soviet markings, serial number 2665534 and date 1954. Optical lenses are clear. Device is complete and in good working condition. It is mounted on an oval wood base which has plaque that is engraved: