(not sure want that ripple Brown in upper corner on back is, but original gum is there and it is not on front of stamp and stamp is not bend or
Louisiana Unused US Stamps (19th Century) for sale
US Stamp Prices Scott Catalog 323 - 1c 1904 Louisiana Purchase Exposition
Shreves Philatelic Galleries, Inc. Sale - 46 Page 25
LOUISIANA PURCHASE
LOUISIANA PURCHASE EXPO
US Stamp Value Scott Catalogue #327 - 10c 1904 Louisiana Purchase Exposition
US Stamp Value Scott Catalogue #327 - 10c 1904 Louisiana Purchase Exposition
323-27 - Complete Set, 1904 Louisiana Purchase - Mystic Stamp Company
Daniel F. Kelleher Auctions, LLC Sale - 787 Page 100
US Stamps Values Scott 324: 2c 1904 Louisiana Purchase Exposition