Red-Blue Watch Guide: The Two-Tone GMT Bezel

What a GMT watch needs

A useful GMT display combines a fourth hand that completes one rotation in 24 hours, a 24-hour bezel or chapter ring, and a movement that supports the second-time-zone display.

The Seiko NH34 provides a mechanical GMT display with an independently adjustable 24-hour hand. Pairing it with a matching 24-hour bezel makes the second time zone readable at a glance. A standard time-and-date movement can still use a red-blue insert as a visual detail, but it does not add a second time zone.

Choosing the configuration

Choose a GMT configuration when you want to follow another time zone. Check the movement, the 24-hour hand and the scale together on the selected product. Choose a regular time-and-date configuration when the two-tone bezel is the main appeal; then assess it as a design choice rather than a GMT feature.

Our GT Mod collection lists the current GMT configurations. The configurator shows the parts available for the base you choose.

Frequently asked questions

Does a red-blue bezel require a GMT movement?

No. It is a colour choice. A second time zone needs a GMT movement, a 24-hour hand and a matching 24-hour scale.

What does a GMT movement add?

It adds a 24-hour hand that can show a second time zone against a 24-hour bezel or chapter ring.