Rudolf Schrotter for Rudolfova No. 11426 Uranium Glass Ashtray.

I now know this to be by the Rudolfova Hut factory, almost certainly designed by Rudolf Schrotter. It is a no. 11426, 125mm. ashtray as found in the pre 1958 catalogue on Marcus Newhall's Sklo Union CD. It is 9cm. tall and weighs over 2.5 lbs./1.15kg. Schrotter worked for Rudolfova from 1912- 1958 but I think this is probably from 1935-1950.