Martin guitar serial dating

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.

Kaohsiung Factory, Made in Taiwan, 2001-: Letter-letter-letter-######. The first two letters are the year; Q=0 and I=2, so 2002.

YMMI (Yamaha Music Manufacturing Indonesia), Made in Indonesia, 1990-1996: ########.

The second and third numbers are the month; March (03).

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.

Last modified 22-May-2015 03:22