Longines Spirit Zulu Time Anthracite Dial Men 42mm L38125532

Celebrating a century of pioneering aviation dual-time instruments and the iconic 1925 Zulu Time pocket watch, the Longines Spirit Zulu Time 42mm L38125532 unites authentic pilot heritage with precious-metal luxury and tailored leather craftsmanship. Forged in an ergonomic 42.00 mm surgical-grade 316L stainless steel case crowned with a genuine 18-karat yellow gold cap (200 microns) on the bidirectional rotating bezel rim and screw-in crown, this timepiece is fitted with a scratch-proof chocolate-brown ceramic insert bearing a 24-hour gilded scale. The dial showcases a textured sunray anthracite finish with gilded accents, applied Arabic numerals, and five applied gold stars—the historic hallmark of Longines' highest-precision calibres—accompanied by an arrow-tipped 24-hour GMT hand and a date window at 6 o'clock beneath a domed anti-reflective sapphire crystal. Powered by the exclusive in-house Calibre L844.4 mechanical automatic movement certified by the COSC (Contrôle Officiel Suisse des Chronomètres), it features true "flyer" independent local hour adjustment, an antimagnetic monocrystalline silicon balance-spring, and an extended 72-hour power reserve. Mounted on a supple brown genuine leather strap equipped with an interchangeable quick-release system and a double-safety folding clasp with micro-adjustment, it provides 100 metres (10 bar / 330 feet) of water resistance and is protected by an official 5-year Longines international warranty.

Key Highlights

• Exclusive Longines Calibre L844.4 Automatic: In-house Swiss mechanical movement featuring true "flyer" independent local jumping hour adjustment, 25,200 vph frequency, and an extended 72-hour power reserve.

• COSC-Certified Swiss Chronometer: Officially tested and certified by the Contrôle Officiel Suisse des Chronomètres for stringent timing accuracy across varied positions and temperatures.

• Precious 18K Yellow Gold Cap Metallurgy: Solid 18-karat yellow gold capping (200 microns thick) bonded to the bidirectional bezel rim and fluted screw-in crown.

• Bidirectional Chocolate-Brown Ceramic Bezel: Scratch-proof ceramic insert calibrated with a 24-hour gilded scale and a luminescent Super-LumiNova® triangle at 12 o'clock.

• True "Flyer" GMT Travel Complication: Independent hour hand that jumps forward or backward in 1-hour increments without stopping the seconds or altering the home timezone hand.

• Antimagnetic Silicon Balance-Spring: Monocrystalline silicon hairspring delivering high resistance to magnetic fields and superior long-term chronometric stability.

• Radiant Sunray Anthracite Dial: Deep graphite-charcoal dial face complemented by warm gilded chapter accents and a balanced date aperture at 6 o'clock.

• Five Applied Gold Stars: Historic Longines symbol signifying the highest internal standards of movement quality, reliability, and precision.

• Domed Anti-Reflective Sapphire Crystal: Multi-layered anti-reflective coating on both inner and outer surfaces for maximum dial legibility from any viewing angle.

• Tailored Brown Genuine Leather Strap: Supple aviator calfskin leather strap with contrast stitching and Longines' quick-release interchangeable system.

• Double-Safety Clasp with Micro-Adjustment: Ergonomic folding deployant buckle featuring dual push-button safety and an integrated sliding micro-adjustment system.

• Robust 100-Metre Water Resistance: Tested to 10 bar (100 m / 330 ft) with a screw-in crown, offering complete security during swimming, recreation, and travel.

• Official 5-Year Longines International Warranty: Backed worldwide by Longines' 5-year guarantee provided for timepieces equipped with silicon balance technology.

Design & Craftsmanship

Aviation Dual-Time Heritage & 18K Gold Cap Architecture

The Zulu Time collection traces its origin to 1925, when Longines created the first dual-time wristwatch featuring the "Zulu" flag—the universal nautical and aviation symbol for Greenwich Mean Time (Zero Meridian Time). Reference L3.812.5.53.2 carries this navigational DNA into contemporary luxury. Measuring 42.00 mm across with a thickness of 13.90 mm and a 49.40 mm lug-to-lug span, the case is sculpted from surgical-grade 316L stainless steel with vertical satin-brushed flanks and mirror-polished chamfers. The bidirectional rotating bezel rim and knurled crown are encased in a solid 18-karat yellow gold cap 200 (a durable 200-micron layer of solid gold bonded over steel). A rich chocolate-brown ceramic insert completes the bezel, offering scratch immunity and a tactile fluted grip for tracking three separate time zones concurrently.

Anthracite Dial Depth, Gilded Accents & Swiss Super-LumiNova®

The dial architecture prioritizes cockpit legibility, balanced symmetry, and warm vintage luxury. Finished in a subtle sunray anthracite hue, the dial shifts dynamically between slate grey and deep charcoal under ambient light. Applied yellow gold-toned Arabic numerals and gilded baton hands are filled with high-grade Swiss Super-LumiNova® that glows intensely in low light. A gilded arrow-tipped 24-hour GMT hand sweeps across the 24-hour ceramic bezel, while an integrated date aperture sits symmetrically at 6 o'clock beneath the five applied gold stars. The outer minute track is punctuated by applied gilded diamond indices, emphasizing the vintage instrument aesthetic.

COSC-Certified Calibre L844.4 Engineering & Micro-Adjusting Leather Strap

Operating beneath the solid steel case back—embossed with the iconic Longines winged hourglass and globe emblem—beats the exclusive Calibre L844.4. Beating at 25,200 vibrations per hour (3.5 Hz) with 21 synthetic ruby jewels, this mechanical self-winding movement is certified as a Swiss Chronometer by COSC. Fitted with an antimagnetic monocrystalline silicon balance-spring, the calibre resists modern electromagnetic fields from laptops and mobile devices while delivering a weekend-proof 72-hour power reserve. Unlike the steel bracelet model, the L38125532 is paired with a tailored brown genuine leather strap featuring contrast cream stitching. Weighing just 114 grams, it provides a significantly lighter, warmer wrist feel and is secured by a double-safety folding clasp with an integrated micro-adjustment slider for on-the-fly comfort tuning.