As 2 the mystery pistol. I 've never seen one along this pattern but I suspected it was a Vietnam Cao Dai, before I read of it supposedly coming out from there. For reference look at the 'Nam section of " Small Arms of the World" 1969 Edition page 720. This group copied most pistol, and guns were supposedly part of their religion, most of their efforts [copies] were more exacting, but they did take considerable liberties in their creations.