The first Longines watches arrived in America in 1868. A few years later, Longines was awarded a gold medal for precision and reliability at the Universal Exposition of Vienna.

To prevent himself from imitation, Francillon decided to trademark the dials on his watches with a winged clepsydra and the word "Longines".

Longines would be recognized as the constant and steady companion of many pioneering aviator in a decade that aeroplanes and airships were recognized as military and exploration tools of great importance.