My first guess would be "Venetian" - but, like most of the listings on eBay (etc.) for these sets (usually a decanter and 6 glasses), I would hesitate at being more specific on the place of manufacture. Some sellers suggest these are 1950s or 1960s, but I have also heard, or seen in books (collectibles guides) that 1920s might be true.
But note that some of these sets are decorated with raised enamel flowers and such work was also done in Bohemia on similar looking items.