Well, I took apart the door pocket and the way it was assembled, it sure looks like factory. The door
panel has the correct number 148 hand written, but the door pocket has no stamp at all. The way the leather is fitted (skived etc.) and seeing that the metal frame is leather covered it sure looks factory - but no stamp.
However, i just removed the leather off the Soft Top Horseshoe Hatch Cover and this does have the
correct 148 stamp ! See photo.
Interesting, that all 4 windlaces have a different number (176), and finding the correct production number on the soft top hatch leather.
Mercakungen & Tyler, you are correct - Thanks.
Maybe there is another 280 with production number 176 driving around with brown windlaces with number 148.