Yamaha YTR-732 Bb trumpet, made in Japan 1972/77. It has a 5 figure serial number, which points to it being an early production model.
It is in very good condition, I cannot find any dents, there are surface scratches showing its age but none bad at all.
All slides/valves are moving freely.
Bell material is yellow brass, the bore size is .445″, the bell is 5″.
The case is not original, but it has obviously been with it a long time, and it fits very well.
The modern equivalent is the Bobby Shew YTR-6310ZS, which currently retails for £1,586 (Yamaha London).