Hi Aussietrev, that's all i've been finding at my local lately,lol, and most of them fried from lack of oil in the fuel.
As for what it is it's basically a "standard 2" in a grey color. They came labelled with varying names, Pacer, tiger, and various others and sometimes not named at all. 6 and 7 inch wheel combo with nylon bushes, not bearings, and straight, not upturned, handlebars.
IMO, it's only worth saving if a visual inspection of the piston through the exhaust port shows it to be in excellent condition. If it's scored and scratched, then scrap it, unless you're going to use it as a learning exercise.
The lack of a starter motor cover on the flywheel housing dates it to pre 92, about 1990 at a guess. By looking at the rake on the mower my guess is the front axle bushes are flogged out or possibly the axle has chewed into the chassis.
Good luck with it and keep us posted on your findings.