Using the charts, we see that H=1991 and P=September. The last three numbers indicate unit number. The number following the letter is the year, in this case.

The letter at the beginning represents the month, so J would be March (see chart above).

If you still can’t figure it out, please see Yamaha contact info at the bottom of this page.Īlternate serial number configurations for Yamaha Classical and Acoustic Guitars First LetterĪ lot of people have written in to say, “Hey! My Yamaha serial number looks nothing like this!” To you folks, we offer the following: Several other serial number configurations used by Yamaha over the years. The last three numbers represent order of production on the day the guitar was made.Įxample: hm02316 = the 316th unit made on June 2 of 1961, 1971, 1981, 1991, or 2001. The first two numbers indicate the day of the month. (Their numbering system began with “H” for 1.) The first letter indicates the last digit of the year of production.

Serial numbers on Yamaha guitars repeat every ten years due to the way they are formed.