What type of bicycle frame is this? Need help with identification. If anyone knows what kind of bike has the rear fender built in to the frame, that might help.
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".