1 Jboler1232 10 months ago Hi Gretsch Gurus,I received a beautiful and old Gretsch but I am not sure what model it is and from what year. I am confused about the converting the serial number to the vintage so am asking for your help. The guitar is a project guitar as the bridge and pickups are not original. The serial number is 78389 and is only located inside the F hole on the sticker; it is not stamped in the headstock. Any help bothers? Thx!