Planetized Steels Sweeps Furrowers Plow Shank Tin Advertising Sign! Made of metal and 12.5″x18″ Hard to find! Thanks and Good Luck! The item “Early Planet Jr. Planetized Steels Sweeps Furrowers Plow Tin Advertising Sign” is in sale since Thursday, March 21, 2019. This item is in the category “Collectibles\Advertising\Agriculture\Seed & Feed Companies”. The seller is “leejuke” and is located in Longmont, Colorado. This item can be shipped worldwide.