1 Sean S. 1 year ago Holy Crap! So there's been a pretty firm understanding of the modern (Post-FMIC) Gretsch serial number scheme for a good while now, but I've just noticed, we were wrong. I've come across conclusive evidence that the last four digits of a Gretsch's serial number refers to it's position within a single month's production for all models produced in a particular factory, not the total year's run Baxter, can we fix this in the Serial Numbers Page? Here's the breakdown. Here's how we (incorrectly) perceive the SN of a modern Korean Electromatic, my 5123-B Bass for example: KS10104466 K..........S......................10...10...........4466 Korea | SPG factory | 2010 | October |4,466th Gretsch (Total of All Models) from SPG in 2010. HOWEVER, I've found conclusive evidence that the last four digits actually show the guitars location within the total number of Gretsches made in that factory for that month only. Here's how I had the epiphany: Jolly Jakester just purchased a 2010 5123-B Electromatic bass, same as mine. Only his Serial number is as follows: KS10113929 (2010, November, Guitar 3,929) Mine again, was: KS10104466 (2010, October, Guitar 4,466) ¡! If the last four digits of our serials indicated the location of a guitar within an entire year's production of Gretsches, my bass (4,466) would have to have been made 537 guitars AFTER Jake's (3,929), but still have been made in October of 20110, ONE MONTH BEFORE JAKE'S! That means the last four digits must represent that guitar's position within the number of total Gretsches produced for that factory's one month's run only. The same thing can be seen in the database when perusing from month to-month with other models. Almost every time you see the range go from one month to the next, (that is, digits 3 and 4 of the serial go up numerically, from 06 to 07, for example, the last four digits of the first guitar for the new month of the same year are invariably LESSER than the last four digits of the previous month's last guitar, proving that the serial numbers must resume at: XX XX XX 0001 for each month! So... Damn I feel smart! Now somebody please prove me wrong so we don't all have to feel silly for not noticing this forever ago!