What type of bicycle frame is this?
What pieces I can deduce from the looks of it.


It was designed for a single speed drivetrain.
No mounts for rim or disk brakes means it was likely meant for a drum rear brake
Ashtabula cranks mean it was old and/or cheap bike.
A curiously shaped "integrated" rear fender means the bike was unlikely to be designed to take part in competitions. Most likely it was a cruiser/utility/novelty bike.
Judging from relative diameters of head and seat tubes, it likely took a 1 inch fork, but it is hard to tell.
Wheel size as well as frame size are unclear as no reference measurements are provided. I can guess it was designed for wheels from 20" to 26".