The 3 digits represent the number of the unit. The third letter represents the month according to the coding system. The first 2 letters represent the year in this case. The sample serial number here represents the 32nd guitar built in May 2001.įrom 2004 to 2022 a 3 letter, 3 number, 1 letter system is used. There is no more internal factory code at the end, and the unit numbers start at 001 instead of at 701. In the period of 1997-2003 the same method was applied as for 1991 K N 712 J is the 12th guitar built in July, 1994. The last letter is an unknown internal factory code.Įxample KN712J belongs to the 12th guitar produced in July 1994. So the first unit of the day was not 001, but 701. The 3 numbers represent the unit number, but in this case the unit numbers started with 701 for unclear reasons. The second letter is the month and also follows the same coding The first letter is the year and follows the same coding system. In the period of 1991-1996 one used a 2 letter, 3 digit, then 1 letter system. The K is April according to the coding system and the year must beġ987, since this system was only used between 19.

This would be a guitar built in April 1988 and the 12th guitar of that day made in the custom shop. The last 3 digits represent the number of the unit (serial number). The letter represents the month and follows the same system for months as the most common system. The closer to 001 it is closer to 1966 and the closer to 1042, the closerįrom 1986-1990 the serial numbers have 1 letter followed by 4 digits. To find the production year, you have to make a rough estimate In the 1966-1985 period, successive serial numbers from 001 to 1042 were used.

This stands for the 123th guitar built in 1986. The last 4 digits are the number of the unit (serial number). In the short period of 1985-1986 a 6-digit serial number has been used but the month is not displayed. The 29th guitar that was built in June 1980. The next two digits represent the month and the last two digits represent the number of the unit (serial number). The first two numbers represent the year. Is no indication of the year of production in this system.Ī nice and simple 6-digit system is used in the period from 1969 to1984. The table YEAR AND MONTH CODING SYSTEM explains the meaning of the letters.Īs you can see in the table, the letter of the year is repeated every decade.įrom 1946 to 1968 a 5-digit sequential system is used. Since 2000, the letter system for year and month is applied at all The serial number coding systems below only apply to the Yamaha electric guitars.

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