GMT & Dual Time Function

GMT and Dual Time are watch functions that display more than one time zone. They help you track local time and a second reference time at a glance.

They are commonly used for travel, international calls, and cross-region collaboration.

Type	How it displays a second time zone	Best for
GMT	Uses an additional 24-hour hand read against a 24-hour scale.	Quick day/night awareness and clean reference reading.
Dual Time	Shows a second time zone via a separate display (sub-dial or window).	Users who prefer clear separation and direct readability.

• 01

  GMT hand + fixed 24-hour scale

  The GMT hand completes a full rotation every 24 hours for stable reference reading.

• 02

  GMT hand + rotating 24-hour bezel

  The bezel enables quick conversion and can help reference a third time zone.

• 03

  Dual time sub-dial or window

  A dedicated area shows the second time zone for clear, separated reading.

Use a simple three-step approach:

• A

  Confirm which display is your local time

  Typically the main hour and minute hands.

• B

  Check the second time zone indicator

  GMT hand, sub-dial, or window—depending on layout.

• C

  Use the 24-hour reference to avoid day/night confusion

  This is the practical advantage of a GMT-style display.

Alignment and legibility

Clear alignment between hands, scales, and markers improves reading speed and reduces mistakes.

Functional consistency

Stable setting behavior and predictable date changes support long-term usability.

Information transparency

Clear descriptions and realistic presentation build trust and help customers choose confidently.

• ✔

  Follow correct adjustment order

  Set time and second time zone carefully to keep reading consistent.

• ✔

  Avoid unnecessary setting during sensitive periods

  This helps reduce stress on the date-change mechanism.

• ✔

  Treat the function as a precision feature

  Good habits keep the watch predictable in daily use.