Issued in 1956, this striking Swiss pair marks 50 years since two national icons of transport began operation. The 5c stamp, designed by Bernhard Reber, shows an early Swiss Post automobile, symbolizing the modernization of postal routes that began in 1906. The 10c stamp, by Ursula Huber-Bavier, honors the Simplon Tunnel, one of Europe’s great Alpine engineering feats connecting Switzerland and Italy. Printed by Courvoisier S.A., both designs feature bold, modernist graphics typical of mid-century Swiss aesthetics, celebrating the nation’s precision and engineering heritage.