Early 1938 Progress PEM sniper scope on its lateral mount, also used on Mosin Nagant 91/30. This set is in pretty bad condition but at least the mount and scope matching condition eventually shows that they were not put together post-war.
Sniper Scopes 
Hi, if you refinishing mount, how do you fill rust holes or do you do so? I have couple mount with light rust marks and holes?
Thx for advice.