Looks to me like a FB 11-7. Eleven drops on 7" spacing. You can go to https://partscatalog.deere.com/jdrc/sidebyside/equipment/68663/referrer/navigation/pgId/15745 for parts breakdown. Some parts are still available. Hope this helps.I picked up this John Deere Van Brunt grain drill which is in poor shape. Can someone identify the model number and/or advise where this information is located on the implement.