Wells Fargo & Co. Express, Nogales, A.T., Feb 27, 1890 (Santa Cruz), violet oval date stamp (Meyer 6, rarity 7) on 1887, 2¢ green entire to Saltillo, Mexico, green Mexican company frank and Celaya backstamp, Very Fine, with seven recorded examples of this express handstamp. Estimate  $200 - 300. $0 (Image)