Keith, thanks for your reply. It would be nice to have a gunsmithing book or chapter on these guns. I have a number of gunsmith books going back to the 40's but cannot find a single paragraph on the LeFever and it's action. Perhaps you could write one?

Why is the hammer pin mark on Dewey's so pronounced and well finished. Clearly on my examples this is far from the case. Is this a grade feature. Higher grades receive more finished work?

With your experience do you think another cocking hook with it's mate hammer pin from another same frame size would be a drop in replacement? Or is there enough hand fitting that this would not work?