I've seen a lot of images that are two or more stamps - the vehicle as a stand-alone with additional stamps such as surfboards, trees, etc. added. I used to own one, too, spent many a night in it on a beach here and there.
Before buying, a check with the seller to find out if the stamp is licensed by Volkswagen might be in order. The V over W inside the circle is one of their trademarks. Use this link to search for the mark:
Trademark Electronic Search System (TESS) Volkswagen has upwards of a hundred variations of the mark registered in the US.
I am not an attorney nor do I portray one on the silver screen or internet. For answers to legal questions consult a licensed attorney.