John / Joe and Lyn,
For the ten years or so when your wide front green GH was part of my collection, I stupidly never took a photo of that lettering before it came back to your collection, but my recollection was the top line was the speed and the bottom line the weight as you describe.
That tractor went up to Alnwick in Northumberland in 1986 with several others from my collection for "The First ever Massey Harris gathering in UK" it was a remarkable event of which John Moffitt was one of the instigators along with Eddie Brown a well known collector and member of the Local Club. I must dig out the old photo's as your wide front was displayed at the side of the ex John Moffitt single front Green Challenger, they both caused a lot of interest over the weekend.
Thanks Lyn for the excellent photo's too, looking at them I am sure its the same driver and possibly the same tractor as the photo I posted from the Vigzol oil brochure.
Malcolm.