Yamaha TRB 4 serial, please help!

Oct 5, 2009
1,555
1,082
4,836
I've scored a great trans blue early TRB 4 with JJ configuration and lower body cutaway, which indicates an early TRB model. However, serial confuses me pretty much. According to this chart
http://www.yamaha.com/yamahaguitars/ElectricandBassGuitarSerialNumberSystems.pdf
my bass should be produced in 1985, as serial on my bass is 5H31xxx
From my knowledge, TRB were introduced in 1989 - 90 so how can it be?

Any Yamaha expert, please help!
 
I've scored a great trans blue early TRB 4 with JJ configuration and lower body cutaway, which indicates an early TRB model. However, serial confuses me pretty much. According to this chart
http://www.yamaha.com/yamahaguitars/ElectricandBassGuitarSerialNumberSystems.pdf
my bass should be produced in 1985, as serial on my bass is 5H31xxx
From my knowledge, TRB were introduced in 1989 - 90 so how can it be?

Any Yamaha expert, please help!
You should be looking at system e4 which doesn’t indicate year of production
 
You should be looking at system e4 which doesn’t indicate year of production
That's what I did and why I started the thread. Serial number at the headstock of my bass has the 5H(number) pattern just like in a system E4 which are for basses made from 86-89.

But big Thank you for your reply...outta from billions members on TB :)