St. Patrick Automatic GMT Day-Night

Powered by the Marvin-developed MAR.620A.G automatic mechanical movement, featuring hours, minutes, central seconds, GMT functionality, a date display, and a day/night indicator. The celestial display at 6 o’clock completes one rotation every 24 hours.

Designed for precise, stable timekeeping, the finely finished movement operates at 4Hz. Actual accuracy varies with wearing habits, position, temperature, and the state of wind.

The case measures 41mm in diameter and 11.35mm thick. The multi-link stainless steel bracelet tapers from 20mm at the lugs to 18mm at the clasp. Final wrist fit depends on bracelet sizing.

Crafted from 316L stainless steel, the case is paired with a matching multi-link bracelet. The crown is engraved with Marvin’s crown emblem, adding a signature detail to the steel construction.

A deep-blue dial provides contrast for dimensional silver-tone Arabic numerals and baton markers. The red arrow-tipped GMT hand pairs with a 24-hour scale, while a date window at 3 o’clock balances the celestial day/night display at 6. Swiss-sourced luminous coating highlights the hands, hour markers, 24-hour markings, and celestial motifs.

A sapphire exhibition caseback reveals the automatic movement, offering a view of its mechanical construction and rotor in motion.

Water-resistant to 50 meters (5 ATM) for everyday exposure to rain and splashes. Keep the crown fully closed around water and do not operate it while submerged.