SCG6979 - Switzerland (Helvetia) – 20c Airmail StampThis Swiss airmail stamp, inscribed Helvetia and denominated 20 centimes, features a stylized aircraft soaring above the snow covered Alpine peaks. Printed in deep green, the design evokes the pioneering spirit of Swiss aviation and the countrys mountainous geography, symbolizing the challenge and precision of early airmail service. The minimalist line engraved style and strong contrast between the plane and rugged Alps make it a striking example of