Jack Mason Strat-o-timer Titanium Diver GMT: Cobalt
Product Overview
The Strat-o-timer Titanium Diver GMT was designed to be a tool watch, taking the brand's flagship model and placing it in the dive watch category. The 40mm shaped case and 7-link bracelet remains as identifiers of the Strat-o-timer platform, but is given an alternative identity with its full Grade 2 titanium case and bracelet. The bezel is equipped with a circular brushed ceramic bezel with a traditional dive marking layout. Inside is the Miyota 9075 GMT movement that features an independently jumping local hour hand, regulated in-house to +/- 5 seconds per day. The bezel, dial, and handset feature Grade A BGW9 to ensure long lasting glow. With a vision of becoming a legacy brand in our home state of Texas, the Strat-o-timer is assembled, and the movement regulated, in the USA.
Tracks Two Timezones
The self-winding Miyota 9075 movement is engineered to precisely track two different timezones at the same time via the orange GMT hand and the 24-hour scale printed on the dial. Every movement is regulated in-house by skilled watchmakers to maintain an accuracy tolerance of ±5 seconds per day.
Made From Titanium
The case and bracelet are built from Grade 2 Titanium, a material made for gear that’s meant to be used, not babied. It’s naturally lightweight, corrosion resistant, and has been fortified with an extra hardness coating for even more resilience. The Strat-o-timer Titanium Diver GMT is engineered to take on the full force of salt, sand, and sea.
Ceramic Dive Bezel
The 120-click unidirectional bezel is built from ceramic and engineered to perform in unforgiving conditions. The circular brushed finish gives it a raw, utilitarian edge that complements the titanium case, while every rotation delivers a solid, confident click that feels as dependable as it sounds. It’s a functional tool purposely built for precision timing.
Legible In Low Light
Legibility is essential, not optional, so the Strat-o-timer is loaded with Swiss Super-LumiNova® where it matters most. Deep pools of BGW9 luminescent material fills the bezel markings, indices, and hands for maximum clarity. In darkness, it glows a sharp blue, cutting through the black, while daylight reveals its crisp white color.
Titanium 7-Link Bracelet
The Diver GMT is equipped with a brand new 7-link bracelet built from Grade 2 Titanium. Its brushed finish complements the case perfectly, creating a unified, seamless look that feels as deliberate as it does durable. Lightweight yet incredibly strong, the bracelet sits comfortably on the wrist and delivers a wearing experience that keeps up with every expedition.
Quick-Adjust Clasp
The bracelet features a concealed, tool-free system for on-the-go micro-adjustments. The clasp has been carefully engineered with 9 levels of fine-tuning to ensure the perfect fit, even over a wet suit. While being worn, all the clasp’s mechanics stay hidden out of view to preserve the bracelet’s refined and uniform look.
FKM Tropic Strap Included
The Strat-o-timer Titanium Diver GMT comes with an extra FKM Tropic strap that is durable, flexible, and ready for long days in the water. The quick-release system is engineered to allow for fast changes on the fly, so you can swap it in, gear up, and push forward to wherever the next adventure leads.
SPECIFICATIONS
Dimensions
Case Diameter: 40mm
Case Thickness: 13.2mm
Lug Width: 20mm
Lug to Lug: 47mm
Movement
Movement: Miyota 9075
Movement Type: Automatic Flyer GMT with Jump Hour
Features: Hours, Minutes, Running Second, GMT Hand, Date
Accuracy: +/-5 seconds per day (regulated by Jack Mason)
Jewels: 24
Vibration Frequency: 28,800 vph
Power Reserve: 42 hours
Case & Dial
Case Material: Titanium Grade 2
Bezel: 120-Click, Ceramic
Crystal Type: Sapphire
Lume: Swiss Super-LumiNova®
Caseback: Closed
Crown: Screw-down
Depth Rating: 20ATM, 200m
Weight: 118g (including bracelet)
Attachment
Bracelet Material: Titanium Grade 2
Width: 20mm > 16mm taper
End Links: Solid with quick-release
Clasp: On the fly micro-adjust
Compatibility: 20mm Straps
To keep your watch performing at its best, we recommend avoiding strong impacts, extreme temperatures, and prolonged exposure to moisture unless your watch is designed for water activities. After exposure to salt water, rinse the watch gently with fresh water and dry with a soft cloth.
For mechanical watches, regular wear helps keep the movement running smoothly. If the watch is not worn often, manual winding may be needed depending on the model. Quartz watches may require battery replacement over time.
Leather straps should be kept away from excessive water and humidity to preserve their appearance and longevity.
Because care recommendations can vary by brand and model, please refer to the manufacturer manual included with your watch for detailed operating instructions, water resistance guidelines, and service intervals.
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Brand Overview
Jack Mason
Year Founded: 2015
Country of Origin: United States
Why We Carry This Brand
Diver Watches
