20 years ago+, I used to ride my 1940 BSA WD-M20 wearing one of these modern new build version of that, made by Davida.
https://www.davida-helmets.com/pages/classic-helmet
20 years ago+, I used to ride my 1940 BSA WD-M20 wearing one of these modern new build version of that, made by Davida.
https://www.davida-helmets.com/pages/classic-helmet
Just the thing for putting round holes in square heads.