Gamma CD - Radio Code for Golf II?

Hello,
excuse my english, i am from Germany. I have a problem, the code for my Panasonic Gamma CD radio is lost. I got it from an old Jetta - but this car is a cube of metal in the meantime. The car dealer couldn`t help me because of the missing car identity. I want to use this original radio in my Golf II from 90 with 315000 km. I am sure I will drive this car for the next ten years-i love it.
The number is VWZ5Z5B0014678
Model 357 035 192B
Ref CQ-JV1020L

Thank you very much!!!!