Up for sale are 2 sealed 25-sheet packs of Kodak Polycontrast double-weight fiber-based photo paper, both of which expired in the early 1960s.  Included is one pack of G surface (lustre) which has an expiration date of 1960, and one pack of F surface (glossy) which has an expiration of 1963.  The packs are in reasonably good cosmetic shape and are still sealed, but obviously there is no performance guarantee due to their age.  Please be sure to fully enlarge the provided photos, and feel free to contact me with any questions you may have.