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For example, serial number JT03074463 would break down as: Of those, JT is by far the most common on the pro-line instruments.However, other Japanese facilities have been used, so it's not particularly unusual to see JD and JF prefixes.If you'd like to learn more about Gretsch serial numbers, we highly recommend Ed Ball's "Gretsch 6120: The History of a Legendary Guitar." Ball is one of the key researchers who have determined the actual dates, years and features Gretsch serial numbers correspond to.
Unlike the pre-Fender codes, specific models are no longer designated within the serial number.
The Fender-era 51xx guitars follow the normal Fender numbering scheme.
When Fender took over production in January 2003 the serial number scheme changed again, and Fender-era serial numbers have a two-character originating factory code, followed by year and month, and finally a sequential ordering number.
Also, on guitars built in October, November or December, the third AND fourth digits denote the month.
Serial numbers on Korean made guitars in this era were printed on a sticker affixed to the back of the headstock.