tractors

My dad farmed in Illinois for almost 30 years and found this in one of his fields when he was out plowing one day. This would have been in the 1950 - 70's. He is in his 90's now and is, of course, going through his life memories and is very curious about this item. Can anyone help him out? He...

This is a printing plate of john Deere. from what i can see it says SAVE MORE GRAIN... SLICE HARVEST COSTS. Its an advertisement for the John Deere 12A Combine. I looked it up and it was made in 1939. I cant read the rest of the plate. I am wanting help identifying this, pictures of it, and web...