There's been quite a lot of chat about the M-H 12-20 tractor on the 12-20 thread.  Here is an image if it from the Racine tractor plant.  This is the Wallis version.  The M-H version was the same except for the logos.  This one strangely lacks its vertical exhaust pipe and I think maybe has an early pulley type.  My M-H 12-20 has a deep dished pulley centre.  Can anyone clarify?

I drove my grandfather's as a child.  They are a delight and easy to drive.  The external gate for the gearbox makes you really think you are part of the mechanics of the tractor.  They were rated as much more fuel efficient than the Fordson's of the day and were certainly generally much easier to start.

John