I suspect that the two images with black-painted blackout masks show the bikes after retro-fitting.

This is a C7828 5SW (the contract was delivered late June - October 1940).



Clearly "Service Colour" (i.e. KG No.3 at that time) on the complete headlamp assembly.

The evidence is conclusive Your Honor! 😊

email (option): wd.register@gmail.com

Thanks everbody, Green it is. It's great that it has sparked off another discussion about headlight rims, for another make of bike.

Cheers,
Dave