Again I have no idea what is original but I have found that standard W clips did not hole the 3 pieces together
They seem to be too short to put enough force on the refector
I bought some bulk O ring rubber and made an O ring to fit inside the retaining ring
Then the glass ( frosted bathroom glass ) then another ) ring then the reflector
If you have it apart, take it to a plating shop & get it replated with bright silver , very much worth doing .

Thanks everyone for your help.

I was hoping to use these
https://www.ebay.co.uk/itm/144112275901

and secure them with these

https://www.britcycle.com.au/product/lucas-headlight-clips-x5-500291/

Making something out of nothing.... hopefully.