Vintage WILSON JONES RECORD KEEPING ESSENTIALS 329-12 Three Ring Binder. Appears to be made of reinforced leather, but not marked. Includes two No. C-31 SHEET LIFTERs and forty-seven period unused sheets of paper, only lined on the front side. The backs are blank and unlined. The SHEET LIFTERs are marked with PATENT NO. 2,252,792 which is recorded as 1939-1941.