https://forum.megabass.it/viewtopic.php?f=7&t=93328&p=1101791#p1101791 ----------------------------------- Ethelred Kain Lun 01 Apr, 2019 10:25 Re: Valutazione Yamaha TRB5 1a Serie ----------------------------------- [user]18741[/user], All'anno di produzione esatto no, però: ''' Made in Japan, 1986-1989: #-letter-#####. 5I04013. The first number is an internal code. The letter is the month; February (see chart). The next two numbers are the date; 4th. The last three numbers are the unit number; 13. There is no indication of year in this configuration–just “sometime between ’86 and ’89. ''' Il secondo "numero" in realtà è la lettera O che corrisponde ad Agosto. Fonte http://mycoolguitars.com/mij/yamaha-guitars/yamaha-guitar-serial-numbers-dating-your-guitar/