Ulf,
you should really check the chassis number (or VIN) that is on your data card and determine whether your car came with the chrome trim piece. If you don't have the card get it from the Classic Center, it is free.
As Dan mentioned, all cars starting with 07641 should NOT come have the trim and no longer have a wooden bow for mounting it. However, there are a large number from VIN 06833 onward that also do not have it. See attached picture with the exact numbers.
In addition there were two types of folding top frames, p/n 113 770 0402 from VIN 07641 to about VIN 19358 - but again with numerous exception, and p/n 113 770 0502 starting with 19359.