W35-7 queries

[Bicycle repair man]

Please can somebody help me with a couple of questions for my W35-7?

First, I need the diameter of the Lucas medallion that fits into the 8" headlights on the models with tank mounted instruments.

Secondly. I have the original 3 brush dynamo which I want to retain. The load resistor at the back of the accompanying 4 position light switch is missing. Can anybody help with the value of this resistor. I also need a switch knob for the switch. The switch knob is symmetrical in shape and the retaining cutaway underneath is in line with the knob

Thanks

[David Samways]

Hi Colin - my 6" L32-3 headlamp has what looks like a 5/8" medallion. I reckon these are the same: https://www.ebay.co.uk/itm/123686237878

I suppose it is possible that the 8" lamps fitted the 7/8" badge.

David