4 wheel spreader in first picture is a New Idea 10 or 10A. I have one setting here now to rebuild for an Amish friend.
Second picture is McCormick No. 200
Third picture is of later style 95 Bu. John Deere Model R due to single lever operation.
Fourth picture Is a New Idea No. 12 or 12A also about 95 Bu. The difference in with the A or without the A is the type of bearings, roller is earlier type and brass sleeve is later type.
And the Amish are pulling the 2 wheel tractor spreaders behind fore carts as they cannot find the 4 wheel spreaders anymore. I need to get the 6 of the 4 wheeler ones I have setting here rebuilt, just not enough time.