Hey. Thanks to all. Conclusion on this and the other forum is ART II mount but missing the second (rear most) thumbscrew! Rock solid on my match M1A. Very happy with several groups at 50 yards - the most we could get at a friend's house. A keeper for sure.
I really hope someone can help me identify the scope mount I have. I friend of mine in Memphis gave it to me around 1982ish. I have always shot iron sights with the M1A (hence the cheat sheet tape still stuck on the stock since Camp Perry in 82 or 83) but my eyes have change and I wanted to...