WMF glass bowl

Beautiful piece of glass with iridescent colour changing according to the angle viewed.
We think this might be by the German firm, WMF circa 1900, but it has no marks (except the postcode marked for security purposes some 30 years ago).
There are some tiny knibs from wear and tear along parts of the rim outer edge.
Size 113mm height, 166mm diameter, 90mm diameter at footed base.

Price £80.