From 1995. Originally there were two books, and although they have been used and reduced, I think there is more than one book's worth left. Please check the remaining amount in the photos. Each sheet is thick and has a sturdy paper quality. There are stains on the sides due to aging. There may be other minor deterioration and damage. Please understand that this is a retro item. Sanrio, Sanrio, nostalgic, rare, Showa retro Hello Kitty, Hellokitty, Kitty-chan