The Sun Rubber Company made dolls from rubber and squeaky toys from 1924. They toys were made in Barberton, Ohio.
Their toy hot water bottle proved to be very popular. Growth continued at Sun with sales of a teething ring and bath sets, as well as more dolls and doll accessories. With a patent for a 1934 DeSoto Airflow, the company entered into the rubber toy car business. They ceased production in 1974.
The dolls are usually marked on the back: "Sun Rubber Co."
In Canada, Viceroy Manufacturing Unlimited of Toronto sold similar named dolls.
What's it worth? Take a look at this Sun Rubber price guide: sold listings for a value indication.