Launched in 1969, the Monaco was a revolutionary "triple threat":

It pioneered the square waterproof case , a radical departure from the round watches of the era.

Depending on your style and "purist" level, you have several paths:

It was among the first automatic chronographs ever made.

Its legendary status was cemented when Steve McQueen wore the blue-dial "Calibre 11" in the 1971 film Le Mans . Key Models to Consider