Thanks Joe, thanks to your help, this got me thinking and I did a little further research and I think we've nailed it....It is a Mark 10. The date of manufacture will be stamped on the flywheel as you have stated.
Here is some info:
The Mk.10 Villiers four-cycle, side valve engine was a typical Villiers product. It was simple, neat and compact, with few moving parts. Because of this simplicity, Villiers engines were reliable and easy to maintain. The engine included the Villiers flywheel magneto, with the engine cooling fan mounted on the outside of the flywheel. Most of the parts were made in-house and additional parts were available for petrol-paraffin running.
The engine had a 50mm bore and a 50mm stroke. The total swept volume was 98 c.c. and the engine could deliver 1.3 h.p. at 2,800r.p.m., and 1.6 h.p. at 3,400r.p.m (HS Engine). It was air-cooled by fan and cowling. A Villiers B10 carburettor is fitted as standard, the air filter being of the oil wetted gauze type or oil bath. The capacity of the fuel tank was 0.5 gallons. Lubrication is by �splash�. The oil sump held one pint. It was fitted with a Lodge CB3 918 mm) spark plug, (BN (14 mm) for later engines)..
This engine was mainly fitted to lawnmowers or horticultural equipment.
The military version of this engine had the words �The V Engine� cast into the crankcase. The V engine saw service in a wide range of applications. In keeping with engines designed for military use, the engine came fitted with reinforced fuel pipes and a screened ignition system.
Here are some pics:
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2012/07/full-1147-7074-dscf0626.jpg)
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2012/07/full-1147-7075-dscf0627.jpg)
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2012/07/full-1147-7076-dscf0628.jpg)
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2012/07/full-1147-7077-dscf0629.jpg)
You have all the numbers on the engine except the date of manufacture, which you can get from the flywheel....what we need now is to find a replacement brass ID plate for the cowling, and you are all complete!