Engineer Hydrocarbon Aero GMT II - 42mm - Silver

Set your local time first. Then, pull the crown to the second position and set the GMT hand to your home time (UTC or your primary GMT reference). Finally, rotate the bidirectional bezel to align with the 24-hour graduation to indicate your third desired time zone.

The micro gas lights are designed to last for at least 10 years, providing consistent illumination without needing external light sources to charge.

While the watch has robust water resistance, its primary design is for aviation and travel. For specific dive ratings, please refer to the detailed technical specifications, but it is not marketed as a dedicated dive watch.

The watch has a built-in anti-magnetic shield rated at 4,800 A/m. Avoid placing the watch near strong magnetic fields (like speakers or MRI machines) for extended periods to preserve its inherent resistance.

COSC (Contrôle Officiel Suisse des Chronomètres) certification means the watch movement has undergone rigorous independent testing for accuracy under various conditions and meets strict standards for precision.

Use a soft, damp cloth to wipe down the bracelet. For more thorough cleaning, you can use a very mild soap and water solution, followed by rinsing with clean water and drying thoroughly with a soft cloth. Ensure the crown is screwed down before cleaning.

Ensure the watch is sufficiently wound. If it's been stationary for a while, manually wind it by rotating the crown about 30-40 times. If the issue persists, the movement may require servicing.

Verify that the GMT hand and the bezel are set independently. The bezel can be rotated freely to mark a specific time zone. Ensure the crown is fully engaged after setting.

The micro gas lights should be visible in darkness. If not, the gas tubes may have depleted (a rare occurrence, typically after 10+ years) and require replacement by a certified watchmaker.

COSC-certified movements are highly accurate. Minor deviations are normal. If accuracy drifts significantly (more than a few seconds per day), the watch may need demagnetization or servicing.