What a wonderful guitar, and the best example of a post 1974 SG we have had in 38 years of having a storefront. It’s a late 1977 serial number, so probably ended up getting to a dealers shop early 1978. Overall it’s very clean, plays great, virtually no fret wear, and a stupid clean original hard case. There is one ding on the treble side cutaway point, some scuffs on the back that are not into the finish so may buff out- not mint but very nice. Thanks for looking!