@bigdog pete...the older, aka surplus m57s have the 1911 style safety, and the factory aka zastava engineered and modified them, themselves at the factory. The new production m57 and m70 have the slide safety...also engineered by zastava and made that way from the factory. The romanian and polish etc that century imports, meaning the surplus pistols all have the crappy added by various subcontracots working for century safeties by the trigger area.
The old fashioned way I think he means in serbia, zastava still makes the pistols the old fasioned way, more than the safeties. although I don't know if that is true or not? I got no idea, but id bet there is some modern cnc machines and such in use at zastava, but like I said, I got no idea?