Hi Bob, many thanks for your reply.
On the matter of the wheels, I feel that these are in fact original, split alloy ones on the front and taper fit (no hubs) on the rear although I'm not too sure about the rear tyre sizes at 6.50 these could be a little bit too wide.
As I said in my previous post, if you look at the front section of the rear mudguards they are not at right angles to the main horizontal part of the mudguard, they are sloping which is a bit different to those on yours. A small difference but still a difference!
The cutter deck doesn't appear to have any unused holes in it so I'm guessing that the anti-scalping wheels are fitted to the correct welded brackets. The deck discharges on the right when viewed from the seating position, other Greenfields that I've seen discharge on the left - do yours? The other thing about the deck is that it is a 28" cut.
There is a part of me that says just cut it cutting the grass and to do that all I need to do is replace the cutter deck drive clutch cork liner, fit a cutter drive belt and replace the rear axle bearings. But there is also another part of me that says restore it and it's got me intrigued! In all probability I'll do both, get it cutting the grass for a couple of end of season cuts then strip it down and rebuild it to as near as I think original condition and specification.