
I don't recognise the black outline enamels, but the crackle and colour remind me of this piece
https://s-media-cache-ec0.pinimg.com/736x/30/09/92/300992875a3db369d1ec966eef68c922.jpgand this piece has a handle which is
very similar to a jug in Truitt's Bohemian Glass page 54 listed under Harrach 1875-1905. The only difference is that in the book the handle forms a ring that goes right around the body at the bottom and attachs at the top with the 'ropes' split so one either side of the neck under the rim,with a prunt. Whereas the one I've linked to has the handle attaching with the ring going right around the neck and then the 'ropes' split at the body and attached separately with prunts.
The small pontil mark might lead me to look at them rather than French first as well.
So because of that, I'd look at Harrach first

But I couldn't say who enamelled them. It's difficult to know as Harrach made glass for other refiners/finishers and also had their own enamelling team.
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