Alberto Santos-Dumont had a problem. He could not see his pocket watch easily when he was flying. Flying was a dangerous business back then and taking your hands off the controls to dig out your pocket watch, open it and look at the time was dangerous. He confided in his friend Louis Cartier who set our to product a watch for his friend that would solve the problem. This was the first pilot watch the Cartier Santos
To propel a dirigible balloon through the air is like pushing a candle through a brick wall . – Alberto Santos-Dumont
The Cartier Santos was born in 1904 and was a small watch meant to be worn on the wrist and easily accessible for a pilot.