Z-01 GMT
COHORT MMXXVI
Here and now
The Z-01 GMT is built for those who keep time in more than one place. The dedicated 24-hour hand, set against a bi-color rotating bezel, displays a second time zone alongside the local one. At a glance, the wearer can read the time in their current location and in another — a watchstander on duty, a contact across an ocean, a coordinate marked in memory. The second zone is always within reach.
A timepiece built around the standard that keeps the world's pilots, sailors, and operators in step.
A standard across time zones
Coordinated Universal Time was established in 1960 as the world's reference clock, replacing Greenwich Mean Time as the basis for civil and military timekeeping. Across the world's airspace, naval operations, and command centers, one reference time governs the rest. Pilots, mariners, and operators have spoken it ever since: Zulu time. The Z-01 GMT is built around that standard.
Built for two zones, the Z-01 GMT is the working watch of those who keep time across them.
On the wrists of those who stand watch
Zulu time is the language of duty rotations, flight plans, and operations orders. From bridge watches at sea to crew briefings in the air, anyone working across borders learns to think in it. The Z-01 GMT carries that standard on the wrist.
Built around the Seiko NH34 automatic GMT, sealed in stainless steel, and finished with sapphire and a 24-hour bezel, it is a working watch — for the ones already keeping time in two places.
On world time, by international standard.
Two time zones at once
The Z-01 GMT carries its function in its name. "Zulu" is the military and aviation designation for Coordinated Universal Time — the reference clock set at the prime meridian in Greenwich, London. Since 1884, the meridian at Greenwich has anchored the world's 24 time zones. Today, aviation, naval, and command operations across the globe speak in Zulu.
The Z-01 GMT runs on a caller GMT architecture. The blue 24-hour hand, set against the bi-color rotating bezel, tracks a second time zone. The hand is adjusted independently of the main hour and minute hands, allowing the wearer to set a reference zone — home, headquarters, or UTC — without disturbing local time.
A black and white visual hallmark.
Built for legibility
The Z-01 GMT is fitted with a bi-color black-and-white 24-hour bezel insert. The two-tone graduation distinguishes day from night hours at a glance when reading the second time zone — black for the night hours, white for the day. The bezel rotates bidirectionally and is set in a brushed stainless steel ring.
The dial is matte white. Applied hour markers and snowflake hands carry Super-LumiNova for legibility in low light. The blue 24-hour GMT hand sits against the white field for maximum contrast — readable at a glance, day or night, in any zone.
Two zones, side by side. Never out of sync.
Keeping the line open
Those who keep time in two zones often keep a connection in two places. The Z-01 GMT, set to a second zone, is a quiet reminder of that link — the watchstander on the other side of the meridian, the home left for a deployment, the headquarters tracking the operator in the field. Two zones. Two places. One reference.
Z-01 GMT Specifications
Movement
Power Reserve
Case
Case Thickness
Lug-to-Lug
Crystal
Dial
Hands
Bezel
Bracelet
Crown
Water Resistance
Case-back
Lume
Steel Grade
Cohort
Origin
Seiko NH34 Automatic GMT, 24 jewels
41 hours
40.5mm stainless steel
13mm
47.5mm
AR-coated sapphire
Matte white
Snowflake hour and minute, blue 24-hour GMT
Bi-color black and white, 24-hour graduated
Jubilee, 20mm
Screw-down
100M
Exhibition, sapphire
Super-LumiNova
316L
MMXXVI
Designed in California
