WMF Glass bowl

this is a WMF crystal/glass bowl that is 171/4" in diameter the edge is rounded with a little drop to the "shelf part of the bowl which is about 4" wide then drops into the bowl it is about 2 3/4" tall it is orange in color with clear & white marbling. I have looked to find a value but all the bowls I found where much smaller. The story behind it is that every year employees where allowed to make one piece for themselves & this is one of those pieces. Yet I can not find a value on it anywhere. It has a beautiful sound when tapped like a piece of crystal glasswear

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