60s vintage hand blown glass vase, retro square jar shape in bottle green

60s vintage handblown glass vase with unusual square shape, 4 1/4" x 4 1/4" x 7 3/4" tall. This is nice, no chips or other damage.

We're guessing Mexican art glass rather than Italian, though we generally find the bottle green glass pieces are made in Italy, and pieces from Mexico are a light aqua more often than green. Possibly Spain? I wish we knew!