Interesting vase. I haven't seen anything quite like this in technique, but this isn't my area. It looks like the colour was applied after the basic shape was developed. I've not seen anything quite so fractured looking applied like that. All I can't think of is that shards of very thin red glass were picked up on the gather, heated, worked into to the piece, and then cased. But that's only a guess in the hope that it will provoke somebody who know what they're talking about to post.
I presume the time period is 1918-1938, when it would have become "Made in Czecho-Slovakia."
David