Pale green crackle glass tumblers, retro mid-century modern vintage

Set of six 5 1/2" tall glasses, vintage crackle glass. Two of these have tiny chips to the rims, the other four look perfect.

We were told this was English crackle glass, which we have never heard of before - it's true that these look nothing at all like the more familiar mid-century Blenko, Viking and similar labels, and the color is a little unusual, too.