Hi Tjames1991 and Jack,
The spark plug was listed in the link I added last time.
I have not seen any documents to decode those Scott Bonnar id numbers.
I would think going by the handle bars on this 35 it is from around 1970 - 1973
https://www.outdoorking-forum.com.a.../85034/booklet-domestic-range-c1973.htmlThe 1973 brochure has no mention of using the Villiers 2 stroke ,possibly Jack has a list of model numbers to
identify this mower from the numbers.
After 1974 the Villiers 2 stroke was not used on any new mowers that I know of.
Cheers
Max