Ingenieur Officially Certified Chronometer 3521

Return to the soft-iron cage after the 500,000 A/m, in the 34 × 8.8 mm Skinny case: the only COSC-certified Ingenieur. “Officially Certified ChronometerChronometerA watch or movement certified for timekeeping precision under a defined testing standard. The applicable certification depends on its maker and period; it is not the same as a chronograph.” above 6 replaces the lightning logo, and a magnifier sits over the date. JLC-made calibreCaliberThe designation of a watch movement, identifying its design or movement family. 887 based on the 889.