Some people want a dive watch that announces itself. The Marathon 41mm Anthracite GSAR, reference WW194006BK-0109, is for the other crowd: a Swiss automatic diver in black from bezel to bracelet that reads as quietly purposeful whether you are in a meeting, on a job site or at the range.

This is still a full Government Search and Rescue watch underneath. Marathon built the GSAR to Canadian Government requirements for search and rescue, and the anthracite edition keeps every working part of that brief: a 316L steel case given a black ion-plated finish, a sapphire crystal, a screw-down crown flanked by guards, and 300 meters of water resistance. The dial carries self-powered tritium gas tubes, rated to glow for around 20 years, on the markers and on every hand, including the syringe-style handset, so the time is legible at 3 a.m. without a flashlight or a moment in the sun.

On its black stainless steel bracelet, the BK-0109 makes a strong case as a one-watch collection for someone who prefers a darker palette. The anti-reflective finish keeps the case low-key in any light, and the date at 4:30 and 24-hour inner track add everyday usefulness without clutter.

Specifications: Marathon GSAR Anthracite (WW194006BK-0109)

• Model: 41mm Anthracite GSAR (Government Search and Rescue), ref. WW194006BK-0109
• Case: black ion-plated 316L steel, 41mm wide, roughly 14mm tall, 48mm lug to lug
• Caliber: Sellita SW200-1 Swiss automatic with Incabloc, 26 jewels, ~41 hours
• Depth rating: 30 ATM (300 meters / 1000 feet)
• Crown: screw-down, protected by crown guards
• Bezel: unidirectional, 60-minute scale, 120 clicks, MaraGlo pip
• Illumination: tritium tubes on markers and hands
• Bracelet: black stainless steel, 20mm lug width

A blacked-out GSAR for people who would rather let the watch do its job than talk about it.