Scott C7 mint 10c - Map of US & Airplanes (blue), Air Post 1926-27 Stamps, representative stamp imaged.
Scott C7 mint 10c - Map of US & Airplanes (blue), Air Post 1926-27 Stamps, representative stamp imaged.
Scott C7 mint 10c - Map of US & Airplanes (blue), Air Post 1926-27 Stamps, representative stamp imaged.