GMT “Double 12” Sloped Ceramic Bezel Insert (30.5x38mm)

This is the sloped ceramic GMT bezel insert we use on the Voyager builds – a “double 12” layout that lets you track a second time zone and still use the bezel for countdown and elapsed timing.

If you want more out of a GMT than just a pretty 24-hour ring, this is the upgrade.

What it is

• “Double 12” GMT bezel layout

• Dual 12-hour scales plus countdown and elapsed timing

• Sloped ceramic insert with engraved, glow-in-the-dark markings

• Includes adhesive for install

It’s built for people who spin the bezel on purpose, not out of habit.

What it does

With the right movement (NH34 or other GMT), this insert gives you:

• Second time zone – run the GMT hand against the inner scale, or line the bezel up for quick offsets

• Readable 12-hour layout – keeps everything in 1–12 language instead of burying you in 24-hour math

• Countdown and elapsed – lower sections of the bezel give you simple set-and-glance timing

Same general idea as the T bezel: one part doing more than one job, without clutter.

Specs & fit

• Outer diameter: 38.0 mm

• Inner diameter: 30.5 mm

• Profile: Sloped ceramic

• Layout: GMT “double 12” with countdown and elapsed scales

• Includes:

  • One (1) glow-in-the-dark sloped ceramic insert

  • One (1) double-sided adhesive ring for installation

Compatible only with bezels/cases built for 38mm OD / 30.5mm ID inserts. Make sure your case and bezel match those numbers before you order.