That’s an oldie fxxxrr.
From the photos it’s identical to mine and gml’s except yours has the flat plate style axle pivot where ours is RHS. * These are what we’ve been referring to as mk2.
Keys to its age are the two piece transmission cover and the piano hinge style. I think you’ve also got the gear motif decal on the front.
Dad definitely got to her

. Greenfield’s lend themselves so well to bush modification and most machines have some. My own mk2 has a couple and I’m trying to leave them there as they are part of the machines history.
It probably originally had a G40 engine. Not sure what’s on it now.
It’ll take some repairing/restoring but it’s well do-able. My own machine started out in poor shape also.
You’ve got two great machines there.
Cheers,
* I’ve been using the term SHS in this thread when referring to this. That’s incorrect. It’s RHS of course. Please forgive.