A pair of check-planter anchors leaning against a press wheel with concave rim. Shown at top: The John Deere planter plates are relatively new and use an edge-drop design. Earlier plates had a center-drop design. Shown below the plates: samples of check lines with "buttons" to trigger seed drop. Top to bottom: Berrien, 1881; L.L. Haworth (a rope with a small wire in the center), 1871; an early handmade piece dating to 1870; and G.D. Haworth, 1892.