That number is a bit out of sequence, which is why I asked for a photo,
versus just "What is the number ?"
So with your photo I can explain the GTS numbers. Unless you have already
determined your answer from your own registry research.
This is a good time to remind others, if you want my reply on your "numbers"
(block, ZF, BSN, build date, etc...) include photos of your ID plates and VIN numbers. Otherwise we are only speculating.
I've had about 1/3 of owners get their own VIN wrong... typos, miss reading etc...
So I am speaking from vast experience!