During the seventies, the technology of integrated circuits featuring quartz with vibrating movements or not and its displays were advancing very rapidly making certain projects in development phases already absolete. Conceived in collaboration with the Battelle institute, the Marine chronometer became in 1974 the most precise wristwatch in the world.

Interestingly this example features a prototype movement number characterised by the four zeros in front of the movement number. Interestingly the last prototype example we sold had a movement only 11 numbers apart (see Antiquorum May 7, 2023, lot 21)