MCM vintage glass ashtray, Pisces zodiac sign big heavy green glass bowl

Mid century mod vintage big chunky green glass ashtray with a Pisces design at the bottom of the bowl. I've seen this attributed to Blenko, LE Smith, Pukeberg Sweden - I don't know the maker here, sorry.

It's about 7" in diameter at the rim, very very heavy. There's a distinctly visible mold line across the bottom (see photos) which I feel makes this a second - but since it's a fabulous design in a fabulous color I was delighted to find it! Nice and clean, seldom if ever used.