I have had a quick look on line, and found very little about these except for a couple of closed bay listings. The one I have here is a wierdie, All steel construction, with a sliding front end that seems to change the focus (10mm travel) , and a cam operated back end with a graduated scale (20mm travel) that seems to do the mag...It looks like a 50' / 60's rimmy job with very fine crosshairs as per a period Weaver. Size is 310mm long with all the bits extended.

Anybody had any experience of these over the years please?, will get some pics up in a bit, but am out getting my league gun checked in a bit so will be a while (It's nearly bell time again already).

ATB, ED