Thanks for the suggestion. I do search first as I am aware that I am a relative newcomer and a lot of what I'm learning is old ground for others. The only info I found at the time was about Vera Walther. Unfortunately the "VW" didn't fit that attribution. HEINER DÜSTERHAUS makes glass which could have included something like my bowl, but he signs DÜSTERHAUS, so although there is a Vera Walther link there it didn't fit either. Unless I missed the thread you're thinking of somehow, the only Volkswagon references I found was Anne's paperweight with a possible VW or VV signature - different to mine - and Martin's wonderful analogy using car manufacturers' branding as an example for why glass companies might use other names for some of their products.
If none of that sounds like what you were thinking of, then I've missed it and I'd be grateful for anything else you might remember so that I can search again.