Hi Frank,
I am a little concerned for the following reasons:
Drahanovsky is not known for designing figures for pressed glass companies. Few Czech experts seem to have drawn any connection, and had Professor Drahanovsky been responsible, (he was, after all, one of the giants in Czechoslovakian glass design at that time, and much studied,) experts at Desna and Jablonec would have no hesitation in making such an identification. None so far, have suggested him as a possible.
The styling of the polar bears, (image by email now) is known to be by a sculptor, well-recorded for his designs for Libochovice for 1920s-30s period.
It would appear that Karel Zentner, was virtually, if not in fact, the in-house designer for Libochovice in the inter-war years.
Allegedly, the glass-blower moulds were used as late as 1959, reportedly by the source under discussion. As it is known that it appeared with the Glassexport logo applied to the base, this suggests use after 1948.
Chambon was first curator at the Musee de Verre at Charleroi.
Regards,
Marcus