Bell H-13-E Helicopter

John Boyle
Also available pre built in red with decal from "Whirlybirds" TV series 1957-59/111 episodes.
I have been told it was sold as a premium from a bread company in Los Angeles.
It also could have been offered by various companies in different cities. Whirlybirds was syndicated to local TV stations, not broadcast by a network (though it was produced for CBS TV), so it had different sponsors in different areas. So the model could have been offered by other firms.