Prospex Alpinist GMT Watch SPB379J1

The Watch

For over a century, Seiko has been refining its watchmaking expertise, consistently delivering robust, high-performance, and reliable timepieces. Its models are one of a kind, embodying a true fusion of technical mastery, innovation, and elegance - as showcased by this Prospex Automatic Men's Black Watch SPB379J1. With a refined silhouette and a neo-vintage aesthetic, it reveals a round case crafted in scratch-resistant brushed stainless steel measuring 39.45 mm in diameter and 13.55 mm in thickness. Designed for men who value authenticity, it delivers a clean, streamlined look. The dial is protected by a domed anti-reflective sapphire crystal that shields against shocks while ensuring optimal legibility. Above it, a fixed bezel marked with black Arabic numerals displays the second time zone. The two knurled, screw-down crowns at 3 and 4 o'clock allow you to set the central indicators. Finally, the screw-down transparent caseback reveals the movement's inner workings and guarantees 20 ATM water resistance.

The Dial

This stunning watch features a round dial in black that enhances its refinement. Clean and minimalist, it offers crystal-clear legibility for effortless time reading - and it's guaranteed to turn heads paired with any everyday outfit. Its understated matte finish dial is elevated by colorful details that create a striking contrast. The perimeter features a bidirectional inner bezel marked with cardinal and intercardinal points serving as a compass. Inside, a minute track runs alongside baton indices and Arabic numerals, with a Lumibrite dot at every five-minute marker. These are tracked by skeleton hands of the Mercedes and sword type, indicating hours and minutes respectively. A seconds hand completes the display. All hands are coated with Lumibrite, as is the fourth arrow-tipped hand indicating the GMT second time zone. A round date window between 4 and 5 o'clock rounds out the display. The brand places its name at 12 o'clock, followed by its logo.

The Movement

At the heart of this exceptional timepiece beats an automatic movement made by Seiko - the Seiko 6R54 caliber - which drives the hands and date window with fluid precision. It features 24 jewels and beats at 21,600 bph (3 Hz). Its power reserve is 72 hours.

The Strap

This timepiece is fitted with a beautiful black bovine leather strap adorned with fine stitching that adds a touch of charm. Supple and comfortable, it pairs effortlessly with any outfit for a polished look. It fastens easily with a push-button deployment clasp. The lug width is 20.00 mm.

Water Resistance

With 200-meter water resistance - 20 ATM in watchmaker's terms - this watch is built for recreational diving. It can handle showers, baths, and shallow-water swimming or snorkeling (apnea). For professional scuba diving, our Ocarat watch specialists have selected dedicated 30 ATM models, available through an additional search on our site. One final reminder: never operate the push-buttons or crown while in the water.