I don't know what it is, but I agree that an image of the base could help establish its origins. Flame polished pontils are not exclusively a studio technique but often an indicator. Czech would normally suggest a factory. Czech factories almost invariably (sweeping generalisation!) had cutting rooms and would have been likely to grind out punties and polish them.
One can never tell from images, but the colours give other pointers. If this were made in a Czech factory, it would probably have had to be made somewhere where those three colours were melted in pots. This would suggest a degree of volume and volume implies that it would be easily recognisable by the colours.
Those colours do look like rod colours - Kugler or similar and a trailed rim is often a studio technique.
The shape is unusual but the two-tone colours with a trailed rim suggests a whole international wave of studio glassmakers who either studied at the Orrefors Glass School since the mid seventies or who were taught by or worked with someone who did. Most studio glassmakers dislike cold work with a vengeance and the use of a torch to melt out punties is how many avoid it.
However, I'm a great believer in trusting your instincts, so your gut feeling that it is Czech may be correct.

You really need one of our Czech experts to come along and give an opinion.