Third pic in the OP clearly indicates a short collar threaded barrel. It's a 1966 /26\ with matching numbers and a heavily sanded stock. Not taking away from others' opinions on origin or value. But it's clearly no longer a solid collector's piece, and should be considered primarily as a shooter, $250 gun IMO. I'm a collector and wouldn't buy it.I think you have a pinned barrel version instead of the screw in type.