Chribska of Czechoslovakia (now Czech Republic) have been making this style of vase for many years certainly pre-70s. Marcus can maybe be more precise.
We see quite a lot of them here in UK. For more examples and info use the search facility (above) and try both Chribska and Chrbska as it's sometimes spelled wrongly (usually by me). They are almost never propperly identified on Ebay.
I can believe yours is 70s vintage or even before. Those with more colors would seem to be more recent. Sometimes the colors are deeply embedded in crystal so that only "lights" of these colors appear.
Larger, heavier, more individually made versions were also made at Skrdlovice, part of the Sklo Union group. I have only seen one labelled so far, which was in a single color. Terry has at least one which we strongly suspect is Skrdlovice in several colors.
As you know, Moser also made some in a similar style, somewhat smaller in the 1930's, usually, I belive only in single colors. Moser colors are well known. I have the yellow one ID'd by Gary Baldwin, author of Moser Artistic Glass.
The Moser and Skrdlovice would be individually hot worked at the furnace. I don't klnow if this is the case with the Chribska ones or not.