This Carrera "Dato 12" reference
link 3147 from the TAG Heuer Museum has aged to a beautiful tropical color. The chronograph layout is similar to the standard two-register chronograph, with the minute
link recorder at 3 o'clock and the running seconds at 9 o'clock. With the
link goal of achieving symmetry, Heuer's initial inclination was to simply add the date at 12 o'clock.