Jaeger-LeCoultre equips the historical case of the 1959 Memovox Deep Sea with a three-counter chronograph movement. The chronograph operating indicator is inspired by the Jaeger-LeCoultre 1930s “chronoflight” onboard instrument. Whatever the conditions, the diver can see at a glance whether the disc shows that the chronograph is ready for use (white), in operation (white/red) or stopped.