The third and fourth numbers are the month; 02=February. The first two letters are the year; Q=0 and I=2, so 2002. (See chart at the top of the page.) The first letter is the year; 1985. YMMI, Made in Indonesia, 2001-: Letter-letter-letter-######, like so: QIM180013.
The next letter (3rd position) is the month; in this case M=June (see chart.) The final three numbers are the unit number. the letter (3rd position) is the month; March (see chart.) The final four numbers are the unit number; 13.
The first letter is an internal code (both I and S were used).
213=unit number; and that last letter is an internal code. (That first letter is an “oh” not a zero.) The first letter is the year; O=1998. The three numbers are the unit number; this started over each month at 500, so unit number 21. Yamaha Music Craft, Made in Japan, 1999: Letter-letter-###, like so: PM222. The first two letters are the year; Q=0 and I=2, so 2002.
Custom Shop, Made in Japan, 1997-2003: Letter-letter-###, like so: NK333.
The first letter indicates the last digit of the year of production. Tenryu/Wada Factory, Made in Japan, 1985-1986: ######.
(Their numbering system began with “H” for 1.) The second letter indicates the month. The last number is an internal code (could be D, R, U, or Y.) Believe it or not, this list does not cover all possible serial numbers. Again, if you’re still having trouble, please contact Yamaha directly as we have posted all the info we have. The final letter is an internal code (could be E, F, I, or S.) Made in Taiwan, 1984-2002: Letter-letter-#####, like so: PH07123. The four numbers that follow are the unit number; (00)11. The second and third numbers are the month; March (03). The third letter is the month; June (see chart above.) The first and second numbers (following the 3 letters) are the day; 18th. Made in Japan, 1984-1986: Letter-letter-letter-letter-###. Craft Rg2550e Rg Japan Ibanez S470 Satin Purple Electric Guitar (dimarzio)Ibanez Xpt700 Xiphos Ohsc : Natural Finish : Seymour Duncans : Free Shipping Ibanez Artcore Series Af85 Right Handed 6 String Electric Guitar Semi-hollow Nice Vintage 1979 Ibanez Roadster Ca.