Known as the "Certified Chronometer" version of the 5513, the 5512 was produced from around 1959 to 1979. Earlier versions such as this example made in 1962, features all the desirable characteristics sought after. Firstly a four line dial with the 2 lower lines in a contrasting silver color, a chapter ring as well as the exclamation point luminous marker at 6 o clock. Secondly a check with the Geiger counter confirms the originality of the lume on the indexes, finally as an amusing fact the three last digits are "007". Preserved in excellent original condition and never offered at auction before, a true collector's piece.