I must say that I have only handled one first version of a "Purdey thumb leaver opener" Bar in wood. The difference from the later second version was it had a swamped rib and non rebounding locks. But knowing Purdey in the early days they would build what ever you wanted. Though you could say with some certainty rebounding locks where fitted to the second version. It is possible the non rebounding locks could be replaced at some future date by Purdey so may be the serial number of the gun would be of more help.
