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Gibson has finally updated their website with the information you need to decode nine digit serial numbers, but they haven't updated the formula: YDDDYRRR. Here's the info -


Gibson USA (Nashville) went to a 9 digit serial number in July 2005 to accomadate their increased production. The sixth number is now a batch number- the batch number starts at 0 at the beginning of the day, and when 699 is reached, the batch number changes to 1. The first 5 numbers and the last 3 numbers still represent the the same info. The only difference is the addition of the batch indicator - YDDDYBRRR


Memphis and Bozeman are still using 8 digits - YDDDYRRR


So, for the most part, if it's an 8 digit number the forumla is - YDDDYRRR; if it's 9 digit number the formula is YDDDYBRRR




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