Hello
stevA warm welcome to these forums.
This is the most advanced of all the Turners.
It's the first high-arch mower made by the big manufacturers.
Best guess, they were introduced in late 1966 and finished in late 1969,
when Turner decided to end lawnmower manufacturing.
Yours is an early one. The serial of yours ends in '/66' (I think), meaning
you have a 1966 model. Yes, it is a Villiers Torque Major engine.
A great restoration here:
https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Main=9771&Number=58821Brochure here:
https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=58962Hope this helps.------------------------
Jack