Hello Pamela, no need to feel sorry or ashamed
, I didn't post my blue bowl in the past, I just remember seeing the pattern identified in Pressglas Korrespondenz a while back.
Very interesting to hear that the STS bowl is from an old Walther mould, it certainly explains why they have near identical dimensions.
This blue bowl appears unmarked, though I had a green example I sold early last year which had the star & wine glass mark. Looking at the handles there is a pattern of curved lines on each, I will post a better photo when I get the chance.
Edit: Although I thought the blue bowl was unmarked, looking at again obliquely in strong light, I can just make out what may be a faint impression of the mark to the centre of the interior.