Professional Getzen Trumpet Chicago series

This trumpet is in excellent condition and I have taken very good care of it. There is a Chicago symbol on it (looks like the band) and a signature. I can only make out a D and then a name that starts with an L. The inside of the bell is bronze. The bell is tunable and removable. The valves are very smooth and there is a code on it SK52356 and L and B on top of the code. I don't know from what time. The case is old too and is very unique. Unfortunately my camera is unable to give the signature and Chicago symbol and justice.