Me again, been doing some more digging - no pun intended!
Looks like it might be a Norlett - big family resemblance to a norlett 5000-006

Hi all, just bought this. Engine is 1984 3hp B&S. Have replaced pull cord but wont start - has compression - going into local mower shop for carb overhaul as I dont have the time to "mess". Be very interested in what it is. No manufacturers stickers except for part of one on the centre...