I can come up with Norton International from the 1930s, Norton Dominator from the 50s (but can't see how it fits).
Even all the flags could be an Atlas.
I'm guessing the D is a Roman numeral for 500. So, knowing nothing about motorcycles but collecting everyone else's deductions, Norton International 500?
I'm guessing the D is a Roman numeral for 500. So, knowing nothing about motorcycles but collecting everyone else's deductions, Norton International 500?
I'm guessing the D is a Roman numeral for 500. So, knowing nothing about motorcycles but collecting everyone else's deductions, Norton International 500?