JC Higgins also had crank chainwheels like that- I'm not sure if Hawthorne Western flyer and JC Higgins were always separate- I think Murray may have been different and don't think it's that-
I don't think chrome fenders were much around before the early 1960's and that's when I'd place it. I was a kid and one of my friends got a blue schwinn with chrome fenders like that- if the hub says Hawthorne I guess that's what it is, unless marketed as something else
might get more positive ID at the Classic and Antique bike forum
sure did clean up well!