some more observations:
newer gunong tend to have a flatter blade profile, sometimes with no central ridge. lucs are generally more abrupt. (top)
the gunong is frequently found with elaborate blade engravings in addition to being made out of fine laminated or pattern welded steel.
other blade profiles are also found. steve ferguson has most of them.
a search here on gunong will bring up a wealth off info, and some startlingly beutiful etched patterns, mostly by our member 'ferguson' (steve) who is the gunong king