Check the listing for details. 1979 H. E. Harris Plate Block Supplement Pages NOS. Condition: New. Listed at 4.99 USD. Enhance your stamp collection with the 1979 H. E. Harris Plate Block Supplement Pages NOS. These pages are manufactured in the United States by H. E. Harris, a reputable brand in the publication industry. The supplement pages are specifically designed for stamp collectors who want to display their plate block stamps in an organized and visually appealing manner. The pages are in new old stock (NOS) condition, ensuring that they have never been used before and are in pristine condition. These pages are a great addition to any stamp collection and will provide collectors with a platform to showcase their stamps. The supplement pages are ideal for collectors who want to preserve and protect their stamps while displaying them for others to admire.