Cast Iron planter lids kept moisture and insects out from getting into the seed corn, and also served as a convenient place for companies to advertise their names.
This ad shows clearly the seed boxes where the planter lids would have been placed. They are directly above the blades. Note also that this is a two-person model. One person would sit in the back and handle the horses, the other would sit on the front seat and drop the seeds by lever. The front, round seats are rare, partly because few two-person plows were manufactured after check-row planters became the fashion. This advertisement was provided by Martin Wilkerson, who co-authored the guide book Value Guide of Collectible Planter Lids and Markers.
A very popular planter lid, this Deere and Mansur attracts collectors because of its lovely and quite elaborate, easily-restorable nature scene.
Although it might be difficult to make out, the center of the bull's eye on this highly-sought-after planter lid holds a piece of seed corn.
An example of a lid which, though less visually interesting than the others shown here, served its purpose as a form of advertising farmers would see often.
John McNamara with some of his roughly 300 cast iron corn planter lids. He says that he doesn't just take pride in his older one, but also likes his newest, a modern, plastic, curved Cole from North CArolina. He also collects grain drill ends and mower tool box lids.