67 my apologiesI picked on of these up today. The s/n on mine is 6971 so if the s/n in the pic above is 6948, would it be safe to assume mine also is a 66?
Serial numbers are undocumented. The labels usually have vanished and, according to Hans, have no connection to the guitar serial numbers. Pots and speaker codes are your best bet for dating manufacture.67 my apologies