Regards James, putting it all together went better than I expected.
One moment I was thinking that it was beyond my limited knowledge, another moment it all went smoothly..
The circular shiny reflector part, that sits inside the Head light, came from a original WW2 Bosch Lamp that was on a rusty bicycle frame in Latvia!
It was too big for what I needed, but it was easily cut to size and fitted perfectly inside the Light.
So, all the parts are of original Bosch nature, including the bulbs.. which are Bosch .. from Halfords
When I was inquiring about different parts, a few people had complete lights for sale at Hundreds of £££'s
I think my one has loads of history behind it and I was delighted that I could get this artifact back up and running once more.
I just love the "Bosch" name embossed on the front Cover.