Conn 22B (1952)

This is a Conn 22B Bb-trumpet, made in 1952, serial number 405098.
There is no engraving on the bell wich is quite rare for Conn production models. Also, after 1930 this model was never equipped with this type of valves. As it happens, Conn was making changes to their 22B model in this period, so this fuels speculation that this particular instrument was a prototype for the new 22B model.
Nevertheless, it found it's way to me in 1990 and became my main instrument as a teenager. It still is in excellent playing condition.