What grade is your gun? Single barrel trap or a trap configured double?
I had opened a thread not long ago about tang locking screws (or french locks) on high grade guns. When they are seen, it usually is on higher grade guns.
As far as the availability of them for replacements. The large tang screw is the same as a normal parker, it just has the cut in it for the lock screw. A replacement screw would have to be fitted to the gun.
I cannot say for sure, but I would speculate that the small lock screw is likely the same sized screw that is used to lock the hammer screws on the side of the frame.
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B. Dudley
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