Can anyone identify this headbadge on an old single speed roadster in Ireland. Ireland had its own Raleigh factory from 1939 to 1976 which apparently produced many mainstream models, and maybe a few uniquely Irish ones. This bike has a Humber rear mudguard, a Raleigh half chainguard and Hercules stamped on the top of the handlebars. But what is the headbadge? Thanks

Garrett