Teisco serial number dating
It consists of a letter, A - L, followed by a 6 digit number.
The letter stands for the month, A for January etc., the first 2 digits will be the year, 76 is 1976, 96 is 1996, the last 4 digits will be the consecutive production number for that months production, 1356 would be the 1356th guitar produced that month.
;) This page is for dating Ibanez guitars built in Japan only.
See the Factories heading a few paragraphs down for little info on guitars produced elsewhere.
The first digit will be the last digit of the year, ie. The last 5 numbers will be the consecutive number denoting production count for the year with the caveat that each month will start at predetermined intervals of 3000 or 5000, etc.A 7 digit number example - C5030567 - translates, 5 = 1995, 03 = 3rd month [March], 0567 = 567th guitar built in March 1995.An 8 digit number example - C03114373 - translates, 03 = 2003, 11 = 11th month [November], 4373 = 4373rd guitar built in November 2003.In a case where a guitar has both the true serial number will always be the headstock number.Plate numbers usually follow the pattern of the first 2 digits denoting year of production followed by a 4 digit number that denotes consecutive production for that model for that year, or consecutive production number for that particular model from the models inception.
Post 11/2011 they changed to alpha, 4 numbers, alpha, the first letter being the month, A for January, the last being the year, B for 2011, C for 2012, etc. - The Guitar Dater Project will decode W, S, I and who knows what other prefixes [factory codes].