Rare Glass Chevron Slice Murano 1 inch x 5 mm.

I have a collection of these. I have never seen them before or since I bought them about 20 years ago. They must have been sliced from a long Chevron pull and then slightly slumped to give them a soft edge. They look as if they might have been made in the 1940s to 1970s, but this is just a guess. You can see the air bubbles here and there. Very unusual.. This one is One Inch by 6 mm. Much prettier in the hand...