I've been keeping an eye out and wondering about this piece.
Does it have any wear on the foot?
Also, it's quite large for a goblet - I have a pink cut to clear quite chunky goblet and that's 6 1/2" and feels standard if maybe a tiny bit tall. Yours is taller and has what appears to be quite a deep bowl? And has that curious petal cut rim that no one would drink out of (appreciate that many intricate or pretty goblets are often just for show though) and is swirled. So firstly I was wondering if it maybe was meant to hold cigarettes or something? I know, a bizarre thought but it reminds me of a celery type thing in shape although perhaps not quite the right shape proportionately (stem too tall, bowl not deep enough etc).
I have also noticed that your goblet is cut to clear with the blue cut under the foot. My pink to clear goblet is like this. I can't find anything Bohemian like this. On those I've found, the foot is drawn down from the stem and so the overlay is over the stem ( and cut through) and then flows down onto the top of the foot and is cut through on the top of the foot. I have the blue over clear perfume that has blue cut through on the base of the piece but it's a different shape, early, and doesn't have a 'foot' as it were.
So I have now come across one swirled piece in blue - it's a vase in the Hermitage collection. It's nothing like your goblet, but it is swirled(the same way as your goblet)- and has a petal cut rim as well with the same eight petals and is very thick glass. It reminded me of this because I've never seen anything else like it. It's dated 1898 after a drawing by I. Murinov.
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I'll keep an eye out anyway in case I see anything else