Vintage Handblown Green & Blue Glass Art Deco Mid-Century Modern Ashtray Bowl

This is a stunningly beautiful vintage piece, in great condition. The green to blue transition is so subtle yet dramatic that it almost seems magical. There is one small chip on the bottom of the piece. I have found no other flaws. I have not found a makers mark, so I cannot be certain of its the origin. I am a collector, not a professional, but I pride myself on being as accurate as possible. The last photo has the chip circled, if you zoom in you should be able to see it, it's quite hard to photograph, it doesn't want to focus when I zoom in on it. Measures 10" across and 3" tall.