Hi, I'm new here, but came across these forums while researching my SG. What a wealth of info and enthusiasm I've found here! \ I bought my SG at Apple Music in Portland, OR in 1988 used. Etched in the foil shielding in the cavity was (is) the name of the previous owner with 1984 (I of of course added my name and 1988). My impression has always been that it was older than 1984, but not probably not a lot (maybe 1980 - 81). The one definitive thing I've learned about it here is that it has the Schaller "harmonica" bridge. The weird thing is that the back of the headstock is black and has a diamond mother of pearl inlay. There is no serial number or made in USA to be found at all. Any ideas? Most of the electronics are not original. The neck pickup may be the only original part of the electronics. The tuners are the ones that came with it when I bought it, but I don't think they're original (they've cracked the headstock). Any ideas? What else should I look for?