Common in the 1970s. The first digit often indicates the year (e.g., a serial starting with "4" would be 1974).
A popular tool that supports many Yamaha formats. Just select "Yamaha" and hit search. yamaha guitar serial number search best
Most modern Yamahas use an 8 or 9-character code. For example, a serial starting with "Q" or "H" usually points to specific years in a ten-year cycle. 2. The Yamaha "Letter-Numeral" System (1960s – Present) Common in the 1970s
On bolt-on electric guitars (like the Pacifica), it may be engraved on the metal plate where the neck meets the body. Summary Table for Quick Reference System Type Format Example Modern Export Taiwan / Indonesia Standard 8-Digit Japan / China Vintage 7-Digit Japan (1970s) Pro Tip for Buyers Just select "Yamaha" and hit search
The first letter represents the year in a 10-year cycle (e.g., H=1, I=2, J=3... up to S=0).