Hi Michael,
very good to see you again here on the forum
the pommel of the landknechtsword is of Norman Type 13, a pommel engraved with rays diverging from the base to give the appearance of a stylished cockleshell. this type appeared from 1470-1640. something like the dagger posted here
http://www.vikingsword.com/vb/showthread.php?t=16452
if I'm not sure if the pan cover button portrays a shell and whether there is some kind of a relation with the pommel.
Do you think that the whole wheelock dates back around 1570 and therefor is a subsequent replacement ?
best,