Thank-YOU for such good, clear images without fussy backgrounds which confuse!
Photographing clear glass is not easy.
I hope somebody will be able to help. I don't recognise it at all. The image in the bottom of the seagull and clouds is rather nicely done. The way is is oriented, I see more of a face in the clouds at the bottom than the gull above. It is of a certain sort of distinctive style, isn't it?
If you would be kind enough, we'd really like to see one other image of the base, to see if there is anything there. There may not be, especially as it does appear to be moulded glass and the feet are there too, but we still like looking at bottoms, if only for the reassurance there is nothing there, or to check that it is the right sort of "there's nothing there".
Has the image been cold-worked or is it moulded too? and I think I can see that it is in the base of the piece, not inside it.
If you cannot find any mould seams, that would indicate they've been polished off, which is a sign of quality.