Excellent Fernando! So it is a 'Z' QED!!!!
NO, not 'Zorro'!!! but compelling to think of Zaragoza!!!
There are numbers of initials used which do not seem to necessarily align with the Christian names of the master using the punzon, so that I must look into more.
Your example is amazing as well! and the pommel indeed very much is like Jean Luc's only truncated. As you note, turks heads are often later added, much like changing gaskets when valve cover is off on engine.
On that note.....that analogy is outstanding on hilt/blade.... and well placed in present context.......not the TURBAN but the man.....not the hilt....but the blade!!!