hi welcome to the GMB. My thoughts with similarly decorated pieces - very thickly applied enamel paint often floral in style - gilded rims and applied dots of enamel - are that the origin is Czechoslovakia - sometimes they are found with labels saying 'Made in the Czech. Republic Bohemian Lead Crystal' - but I'm also aware that some people here include Murano I think.
Date wise I'd suggest they are quite recent, and possibly very recent.
If you have a few vases like this, do you acquire them from estate sales?
Sorry this isn't overly helpful - and regret that quite possible that you won't find the actual name of the factory - labels on pieces like this often show only the exporter's name.
Not that it really makes a difference in this instance, but it's the practice here, usually, to include the size/height of glass pieces.
These are attractive and bright, also very useful