Which of these is the correct one?

I want to replace the fuel cap on my 1991 gti cabrio with an original one as it currently has the wrong one on there, but im unsure which one is the right one. Could somebody point me in the right direction.


or


Thank's guys.

i believe its the top one, bottom one is earlier models. top one is best as crud doesnt get into the lock, but fit whichever you like the look of

1st one