hi there,
in a book i have they give load sof info on gibson serial numbers , and boy are they messed up!
they went through a few different nembering systems!
from 1953 to 1960 it was a 5-digit number ink-stamped to the back of the headstock, in 1955 they added a digit,
in1961 ,they became stamped into the wood, and the serial numbers became very haphazard!
in `75 they implemented a simpler scheme, 8-digits the first two being the year code: , eg 99=1975, 00=1976, 06=1977 ... hmm i see the logic there! these numbers were now a decal including the writing"made in usa"
in`77 they changed it again... 8digits, stamped, 1st and 5th digit gave the year, eg; 93291369 = 1991
if you tell me the first digit i may be able to help because i have the listings in a book in front of me , i cant type it up here , because it would take years!. rock