J.R.B.

I've got a twin to your gun. Mine was imported by Bach Walker International in Detroit. Was obviously made for the US market with a beavertail, white line recoil pad, full pistol grip, and 3in chambers. The link that Patriot USA gave you also will tell you the proof date. Mine is Q1 which is 1972.

Only problem with mine is a poorly fitted forearm wood.
Killed 6 blue wing teal with mine this week.

Jeff