This set of Treasury of Stamp Cards from the United States Post Office is a must-have for any stamp collector. With a range of multiple people and items featured, this collection is sure to provide a diverse and interesting assortment of stamps. The cards have been well-preserved and are in excellent shape, making them an ideal addition to any collection. The cards have not been certified, but their quality is evident in their vibrant multi-color designs and intricate details. This set is a great opportunity to add to your collection of United States stamps, and it is sure to impress any fellow collectors.