1 kazoo 9 months ago I recently picked up a Synchromatic model, and had some questions about it. It is 17" wide, with triple binding on body, neck, headstock and cat's-eye holes. Fretboard is rosewood with block abalone inlays, some very colorful. I believe the gold tuners and tailpiece are original. It has a penciled serial # inside (888) and faded stamp "GRETSCH" "SUPER STRUCTURE".I believe it would be a 1947 model, the appointments seem to match Gruhn's "6012" except he specifies quadruple binding and this is only triple bound. Otherwise it seems to be a match.But I can't find any info on the 6012 model anywhere except Gruhn's book, and an old thread here that seems to indicate it is the same as a 175 model?Any help would be appreciated! Thanks!