I've got a 1976/77 Gibson T-bird that has "second" stamped on it. There are not enough numbers for 76, 77, etc. There are only 6 numbers and they are stamped on the back of the headstock just under "second." (Stamped as in like the '60s versions. the 70's version had a label under the finish not a stamped number.) The pots date to early '77, the pickguard is a '76. I'm wondering if there is any way to date a weird serial number like that. Anyone have any reasonably founded ideas on getting info on such an odd number? Dating that number shows up as a 1967, which it is not. I've emailed Gibson, but don't expect to get much of an answer. Any help would be appreciated.