Maybe the trailed decoration was laid down in the mold and then the body glass was poured in? Then hand-finished as Alan suggested?
And the guy, seeing the final result, thought to himself "the world doesn't need more than one of these," or maybe "nah, not worth the trouble," and tossed the mold?
It's awfully weird, however it was made.
And I'd guess Akro fits in there somehow, just because that's the only source of that color combo that I know of. But there could easily be some I don't know about. since I don't know much about figurines, ashtrays, etc., from other companies.