Thanks for your rapid responses and obvious knowledge of these machines.
I've had the mower for a couple of weeks and have dismantled it, taking lots of photos along the way, though unfortunately, not one of the complete machine

I've rebuilt many B&S engines over the years and have stripped this one - it is in quite good condition and will rebuild without any problems.
However, my experience with SB mowers is limited to watching my Uncle mow when I was a kid, so I'll need your kind guidance and assistance.
I've attached various photos of the bits of the mower that may assist in identification.
Chris
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2012/04/full-5834-6017-mower_body.jpg)
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2012/04/full-5834-6018-cylinder_drive.jpg)
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2012/04/full-5834-6019-front_rollers.jpg)
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2012/04/full-5834-6020-handles.jpg)
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2012/04/full-5834-6021-engine_cowling_numbers.jpg)
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2012/04/full-5834-6022-mower_body_serial_number.jpg)