Plats filed in equity proceedings, some of which were placed in the case files with others being recorded in equity record books. The series consists of plats removed from the case files because of their size or physical condition and placed in oversize storage, and of plats recorded in equity records that were filmed by the Land Office in 1955, now found in series CM1430 and CM1431. Access is available through an electronic finding aid derived from (Plats on Microfilm, SO, Index) in series S1545, supplemented by the records themselves.