I have no clue. It's hard to tell from a photo. Photo was a post in AR15.com. Just said he got it when his dad died and identified it. They haven't been imported that many years, so his dad didn't have it very long.
I'm pretty sure the target grips are one of a kind, way too fat for my taste.
There's a guy in Hungary that makes nice grips for them, but not target. He has 7 choices of wood and 5 finishes. Checkered, stippled, or smooth. Would be hard to decide! I've been tempted but about $100 with shipping and six weeks wait. They're thicker than factory, too.