Lansing Lithographers factory parts book binders. I know this style was used in the mid 1960's and into the early 1970's. These are very heavy duty, high quality pieces meant to stand up to every day use. The metal parts are stainless steel. Both binders work fine. Between the two they should hold over 3000 pages. These are all original, and unrestored. They are VHTF in this condition. $299.00. PM me if interested.