1985 Conn Constellation 38B 20 Trumpet with case, after market Amado wk’s

Serial number 500019, for some reason in the early 80's Conn began to recycle serial numbers

Built at the Abilene Texas factory. There's no model number on the mouthpiece receiver, & I've no explanation for that 

I'm told that a 20 after the model number means it's lacquered, which it is