Well after a little investigation it appears the mower might have done a little more work than I first anticipated. Everything still seems in very good condition.
The code from the engine block is as follows: I4500212009900427.
I think at some point the filter was oiled but the pre filter was very dry when taken apart.
I have included some extra photos for the thread. I'll await your advice on which Honda engine it clones.

I am also sure this uses Honda 19 inch blades as all the measurements match up. Happy to be correct if others have more experience.

peter

[Linked Image]
[Linked Image]
[Linked Image]
[Linked Image]
[Linked Image]
[Linked Image]