Bought simply because I liked the delicate uranium colour, and only discovered the two tone effect later - it reminds me of Reich's 'Viktoria' sticks that shade down from from green to pink - picture attached - although the effect is far more striking in the sticks.
I've not attached a picture using the u.v. torch, but it does fluoresce strongly (as do the sticks), although as you'd expect more so in the upper half of the bowl - diameter is about 9.5" (245 mm).
Pamela's pressglas-pavillon appears to indicate 'Hubertus' started life in 1937, and is seen also in 1952, but seems to have gone by the early 1960's catalogue - possibly the deco pattern thought by then to be old fashioned.
Here is the example from Pamela's catalogue......
http://www.pressglas-pavillon.de/schalen/02111.jpgIt appears the catalogues show a shallow bowl (as above), and the later one adds a vase, I'm unable to see a deep bowl like the one posted here - can only assume I've missed it somewhere - unless there is only the one shape.
This bi-colour is unusual but attractive, and improved visually by the strong deco design. Apart from the Reich trinket set, does this two-tone effect occur in other uranium bowls anyone know? thanks for looking