From what I understand, they were a generic, injection molded decoy that was sold by the Crosby Mfg. company in the "60s & 70s". Similar to the Miller decoy that was produced in West St. Paul. No feathering detail, one pose, and no paint. They were designed for the waterfowler on a budget that could paint his own decoy.
Personally, I've never seen one of these before. Has anyone else?