Double domed, boxed sapphire crystal. The Strat-o-timer GMT sports a sapphire crystal that is raised above the bezel by a few millimeters as an homage to vintage watches that used acrylic crystals. We’ve recreated this look with a sapphire crystal in lieu of acrylic to increase the durability and reduce any potential scratching.
Leading the Way In the GMT Revolution
A new era.
Be the first.
Housing the all new and limited Miyota Caliber 9075 movement, the Strat-o-timer features an automatic GMT movement with jump hour functionality. Other features include a boxed sapphire crystal, 200m WR, and a bi-directional bezel with multi-colored SuperLuminova. This entire package is designed, assembled, and regulated in the USA.
Special Early-Bird Perks
Limited to the first 500 units reserved.
Strat-o-timer GMT in the color of your choice.
Special FKM and limited edition leather straps.
3 leather bag tags that match your Strat-o-timer GMT.
Digital print of
Frame-ready, poster quality digital print of concept sketch.
Get 20% off on all straps from now until the end of 2023.
First access to the
Get exclusive info and first access to our next launch.
Checks Every Box
The Strat-o-timer GMT checks every box. Loaded with top of the line specifications and completely designed at our studio in Texas, this watch was held to the highest of standards.
Miyota Caliber 9075
Automatic GMT. The Miyota 9075 is a self-winding movement with a 42 hour power reserve, 24 jewels, and 28,800vph. Its functions include a GMT with jumping local hour, which is functionally identical to a Rolex GMT-Master II and is generally only reserved for watches in higher price ranges.
Regulated in the USA
Fine tuned for accuracy. Every Strat-o-timer GMT has been regulated for higher accuracy by Jack Mason. Like a car engine, we take a stock part and maximize its output for better performance. It is regulated to an accuracy of +/- 5 seconds per day. Without regulation, the movement’s stock accuracy is +30/-10 seconds per day.
Assembled in the USA
A first for Jack Mason. We are bringing watch assembly closer to home in order to have full ownership over quality control. This is another step closer to fulfilling our vision in establishing ourselves as a legacy brand that holds generational value.
True GMT vs Caller GMT
Jumping hour hand functionality. Both versions of a GMT have a fourth hand to display a second time zone. However, a True GMT allows for independent adjustment of the time without affecting the GMT hand (which a Caller GMT can’t do). This means a wearer can set the GMT hand to home time and then conveniently adjust the local hour hand while traveling.
Vintage Inspired Sapphire
Read the Lume
Seven layers of Swiss Super-LumiNova®. To increase low-light legibility, Swiss Super-LumiNova® has been added along the bezel, dial, and hands. The bezel has 7 layers of printed lume and the indices are filled with lume for a deeper, longer lasting glow.
The Perfect Fit for All Wrists
On-the-fly bracelet adjustment. The 7-row, 316L stainless steel bracelet has a comfortable 20mm to 16mm taper and is equipped with solid, quick-release end links. The micro-adjust buckle seals the deal and ensures a great fit on wrists of all sizes.
In The Media
Relative Time: An American Assembled True GMT!
Avg. Joe Watch Reviews: NEW!!! Traveler GMT Jack Mason | Miyota 9075
Jack Mason: The Best True GMT Under £830.00
Winding Crowns: Jack Mason Strat-o-timer True Jump Hour GMT
WatchChris: Affordable True GMT Jack Mason Strat-o-timer
Average Bros: Strat-o-timer (True) GMT Prototype Review
Unboxing: Strat-o-timer GMT Prototypes
Superlative: What It Really Means To Build Your Brand with Peter Cho
An Impressive Entrance
Strat-o-timer GMT First Look Event. The prototypes were revealed at our studio in Dallas, Texas among a group of YouTubers and enthusiasts from the watch community. The excitement was high as the prototypes were passed around.Watch Strat-o-timer Videos
Comments from the Community
“Looking forward to the Jack Mason true GMT watch!”David B.
“I love the use of the miyota 9075, shows you guys actually know what you’re doing”@casualwatchguy
“The jumping hour hand is EVERYTHING”Jack B.