Louis cartier created the santos watch in 1904 sealing his friendship with the aviator of the same name the famous aviators wish was granted he could check the time while flying the rounded angles and exposed screws of the dial made this an iconic timepiece cartier marked the centenary of the watch with a steel versionsteel case steel octagonal crown set with a faceted synthetic spinel sapphire crystal silvered opaline dial roman numerals luminescent sword shaped black oxidised steel