ZENITH Chronomaster Original El Primero 3600 Automatic Chronograph 38mm Watch EN_engagement-ring The mono-crystalline silicon balance-spring provides

The mono-crystalline silicon balance-spring provides a substantial power reserve of approximately 72 hours

3 Interlocking G motifs

and is powered by Accutron's Swiss-made 26-jewel automatic movement to guarantee 6 quality and reliability

This model features a stainless steel case and bezel which includes a tachymeter scale on a black aluminium ring

ZENITH Chronomaster Original El Primero 3600 Automatic Chronograph 38mm Watch EN_engagement-ring The mono-crystalline silicon balance-spring providesThe CHRONOMASTER Original is crafted in a 38mm steel case in the same proportions as the A386, paired with a black "reverse panda" dial and a steel bracelet. Powered by the El Primero 3600 automatic high frequency chronograph movement with 1 10th of a second chronograph function and a power reserve of 60 hours.