
WOW!

Italian glass is not my area. But that is something truly fantastic. I think it might be a bit newer than I was expecting.
You definitely need a specialist, world-wide auction for that.
Is there a signature on it anywhere? You might need to look very carefully to find a mark, but I cannot imagine somebody who made that did not sign it.
Sotheby's and Bonham's specialist glass auctions would be right ones.
Please, be aware that I am not somebody who knows about Italian glass. I'm just using my personal judgement from what I can see in those photos. And I cannot get close enough to be able to see much detail, I cannot really tell how well made it is. It looks as if it
should be very well made.
I would call it a sculpture.

I looked up el trittico - it translates into triptych. Is that the name of the shop?
It does not appear to be a glass company.