[Raf]

Hullo Fernando. Thank you for helping to keep this thread alive.
I’m sorry your comments didn’t translate very well, and if I have misinterpreted them apologies. I will try and answer them as clearly as I can.
Bolts rather than screws. –" Of no significance."
If we see similar stylistic or technical features (the bolts) that are shared by other locks it is reasonable to suggest that they might form a group, and that they might belong to the same geographic area or be of similar date. If these locks also have some early features and we don’t see the bolts on later locks it is reasonable to suggest these bolts might be a characteristic to some early locks that was later abandoned. Unless we are prepared to make these kind of comparisons we couldn’t research or try to date anything.

The wheel release mechanism with no prop. "Just different."
Sorry. No. The second prop is a fundamental stage in the development of Wheelock design and seems to happen quite early. It was found; probably through bitter experience that the single locking bar, (which was occasionally simply a flat spring) could, if the nose of the sear was worn, or more likely the hole in the wheel was blocked with dirt, appear to lock the wheel, but in reality it was just hanging on the edge of the hole. Thus a knock could dislodge it and the gun would fire by accident. The second prop ensures that the wheel will only ‘ lock off ‘ when the sear fully enters the hole in the wheel. Its perfectly reasonable to conclude that wheelock’s with a single locking bar are, at least in evolutionary terms, earlier than those with the double locking system because experience had shown this system was in practice unsafe.

The pan cover opening mechanism.
I’m not sure what your point is. All I can say is that I haven’t seen a similar system before but if someone else has it would be nice to know. It seemed reasonable to suggest that this slightly convoluted arrangement might be an early stage in trying to work out the best way to open a sliding pan cover

The Portuguese lock "has the characteristics of a late model."
I don’t know anything about Portuguese locks. Are you saying the date 1550 is wrong? I thought there was a suggestion that it might be of Italian manufacture? I assume it has a one piece hooked type combined arm and flash pan cover as seen on some early German wheelock’s prior to the introduction of the sliding pan cover. This is shown in the dismantled wheelock attached; German C 1540. (The Met; New York) Notice also that despite its early date it does have a secondary prop for the wheel-locking bar.

The release mechanism for the flintlock.
There seem to be some missing bits in this area. The pivot for the cock looks inadequate. One would expect it to be supported by a bridle as in an aqujeta and I assumed that was what the holes were for. Its difficult to imagine how a spring to release the dog catch (as on the aqujeta) might work as the hook on the catch doesn’t seem big enough to hold.