I posted this on thecabe and someone there suggested it might have links to CCM
It does look like the 1930 Heavy Duty I found in this forum.
Any ideas on age? I can't see it in any British Hercules catalogues.
It's rather confusing, as the frame is US style, but it has British size seat-post, British metal wheels, and British style frame number.
Not sure if it was made in GB for export to USA, or made in USA.
The markings remind me of a Hawthorne: did Herc and Hawthorne have a tie-up prewar too?
Has 28 x 1 3/4 tyres, which are now obscure in UK - are they still made in USA?