Thank you for the assistance.
I'd already assumed it was the Mayfair 2 but finding information online was near impossible for me. All the Mayfair's I could find where the later plastic fuel tank/cover units like my father had when I was a boy.

The compression is actually incredible, I'm going to remove the plug and stick my compression tester in later, if it ever stops storming here, Thankfully, without the decompression valve of the later victa's you can easy feel it (heaven knows why a small 2 stroke engine needs a decompression valve.

It works better than any mower I've used over the past 45 odd years and is a darn sight easier to push than a horrid MTD 4 stroke mower with that nasty American made B&S cheap, nasty, worse than Chinese made engine I used to own.

I started it up first time at 9:00PM after somewhat heavy rain most of the day and idled it through a patch of 2' high (600mm for the youngens here) wet grass and weeds and it didn't even look like choking. Everything else I've owned or used would always die in that patch. Plus with the mulch it leaves small cuttings, no need to rake.