was out snooping around my cousin's junk before the iron man cut it up and noticed under some junk and pipe was a green disk, 16-18' wide. It has some new blades and bearings on it, but was too big for his 4020 and was rusty so he didn't want it. Gave him 2 cases of beer, and went home and disked 6 acres of oat ground with it. Anybody tell me anything about these disks? The wings are gone, has a big ring hitch which I put a clevis in. Did a good job for me. It says "FWA" on top of the center pipe, didn't notice any serial tags anywhere, know Deere put them on just about everything though.