They are signed by Archimedes Seguso.
The red label on all three reads Archimedes Seguso, Murano, Made in Italy.
I was with my friend in Murano when she purchased several of them at his gallery. I also have one that is like these. Plus we have several other of his pieces including a tiffany perfume bottle.
You are right, they do not look like his other work. That's why I am having difficulty finding any comparables.
The one in the middle is 9/100
The one on the right is not numbered
The one on the left - is not here for me to look at.
I also have 3 more pieces very similar to these.