Hi Philip
Thread sizing is a good idea. I'll tend to that soon. That could answer some questions.
Meantime, take a look at this old photo sent to me by a shooter/collector friend.
Of course it's a wheellock, but notice the hatchet shaped trigger piece that would simply spread the sear bar inward when the trigger is pulled backwards.
He mentioned that it is believed this lock was from a wheellock/ax combination.
Rick
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