Scott National Series Album Pages: U.S. Plate Block Perf. Varieties 1978-1993 (10 Pages). - These pages reflect the new listings for major perforation varieties as listed for the first time in the 2001 Scott Specialized Catalogue. The pages serve as an addendum to the U.S. Plate Block Album and will not be part of future supplement releases. Stamps with the same design having perforation differences of at least 1/2 perf. gauge are now given a major catalogue number. For more information on the addition of the perf varieties see the article in the News and Notes section at the bottom of the home page.

Item Subjects: Scott Stamp Albums & Supplement Pages, Scott North America Album Supplements