US 1918 Sc C3 Washington NY Philadelphia Airmail Service May 18 From Senator Updated on January 15, 2024 By admin Comments Off United States 1918 flight cover franked with Scott C3 from top of sheet. The plane with a significant above border of stamp. Hinge remnants on back of envelope. Feel free to ask if you have any questions. Share Tweet By admin You May Also Like US 1918 Sc C3 Washington NY Philadelphia Airmail Service May 18 From Senator US 1918 Sc C3 Washington NY Philadelphia Airmail Service May 18 From Senator