Thank you for words Rick.
Indeed the lock is the great asset. Made by a master recognized by local arms historians. According to the Viscount de Villarinho de São Romão (1835), it was Bartholomeu Gomes "who gave the greatest enlightening in musketry".
Price, considering the lock, was not bad ... but not too good either; swapped with a French 1777 musket.
Concerning belt hooks, you know i could almost swear i saw them mounted in full size shoulder guns ?. And by the way, take a look at the 6th picture in post #17; a part of a Spanish luxury hunting escopeta. Istn't that the hole for a belt hook ?