Here is an early Mauser Low Turret Scope for BYF rifle serial 20784. This one is marked on lip of front ring and bottom of rear foot like an early Mauser BYF Low Turret. The Ajack Scope serial is 44543. Has an assembler type number of 158. I choose to show this scope for it's numbering characteristics. Differs from the way Sauer numbered their Low Turret Scopes in that the bottom of rear foot is numbered instead of the face of rear foot by the locking lever. Also, was hoping someone else would have photos of an early scope like this they would post as well. Thanks for any interest.