Where to locate the serial number on a Yamaha Trumpet?

Question

I am trying to find out about a yamaha trumpet that I was looking at in the pawn shop, I called to ask for the serial number she said" she couldn't give out that information.

Answer 1

the "letters" = yamaha trumpet

the (insert numbers here)g" = the model number

the serial number. Usually they are stamped on the outer casing of the 1st valve sleave.

Answer 2

nowhere