GMT vs Dual Time: What is the Difference and Which Do You Need?
What Is a GMT Watch?
A GMT watch has a 4th hand that rotates once every 24 hours. It points to a 24-hour scale on the dial or bezel, letting you read a second time zone at a glance. The term comes from Greenwich Mean Time, the international time standard.
If you live in one time zone but work with people in another, a GMT watch lets you see both times without doing mental math. For example, if you are in New York and your colleague is in London, the GMT hand shows London time while the regular hands show New York time.
All Funny Items GMT watches use the NH34 movement, which is the affordable, reliable GMT calibre from Seiko. See our full GMT Watches collection.
What Is a Dual Time Watch?
A dual time watch also shows two time zones, but it works differently. Instead of a dedicated 24-hour hand, it uses a second hour hand or a separate subdial. The second time zone is shown on a regular 12-hour scale.
The key difference: a GMT watch uses a 24-hour hand, while a dual time watch uses a 12-hour hand. Both show two time zones, but the GMT is more practical for international travelers because the 24-hour scale eliminates AM/PM confusion.
GMT vs Dual Time: Side-by-Side
| Feature | GMT Watch | Dual Time Watch |
|---|---|---|
| 4th hand type | 24-hour hand | 12-hour hand (or subdial) |
| Second time zone | 24-hour scale | 12-hour scale |
| AM/PM confusion | No (24h scale) | Yes (12h scale) |
| Bezel | 24-hour rotating bezel | Fixed or no 24h bezel |
| Movement | NH34 (Seiko) | Various (VK63, etc.) |
| Best for | International travel, frequent flyers | Occasional travel, casual dual time |
| Price | Slightly higher (NH34 movement) | Varies by movement |
Which One Do You Need?
Choose a GMT watch if:
- You travel across time zones regularly
- You work with people in different countries
- You want to read a second time zone without AM/PM confusion
- You want the classic 24-hour rotating bezel look
Choose a dual time watch if:
- You occasionally need a second time zone
- You prefer a simpler 12-hour display
- You want a quartz chronograph with dual time
- Budget is a primary concern
Funny Items GMT Watch Builds
Every Funny Items GMT watch uses the NH34 movement with a true 24-hour GMT hand. Here are our most popular builds:
- Pepsi NH34 GMT — Red and blue bezel, the iconic travel watch look
- Batman NH34 GMT — Blue and black bezel, stealthy and versatile
- Meteorite NH34 GMT Watch With High Quality Bezel — Unique meteorite dial with ceramic bezel
- Vintage Black NH34 GMT — Aged dial with bronze case, retro traveler style
- 39mm Vintage GMT NH34 — Compact case, vintage dial, perfect for smaller wrists
- Vintage White Pepsi NH34 GMT — White dial with Pepsi bezel, clean and classic
How to Read a GMT Watch
Reading a GMT watch is simple once you understand the 24-hour scale:
- Regular hands (hour, minute, second) show your local time
- GMT hand (4th hand) points to the 24-hour scale on the bezel or dial, showing the second time zone
- The rotating bezel lets you set the GMT hand to any time zone by turning the bezel to align with the GMT hand
If the GMT hand points to 14 on the 24-hour scale, that means 2:00 PM in the second time zone. If it points to 6, that means 6:00 AM. No AM/PM guessing needed.
Build Your Own GMT Watch
You can build a custom GMT watch with Funny Items parts:
- GMT Watches — Complete builds, ready to wear
- NH34 GMT Dial — Dial designed for NH34 GMT movement
- 40mm Bidirection Rotation GMT Case With Bracelet — Case with 24-hour rotating bezel
- GMT Hand for NH34 Movement — The 4th hand that makes it a GMT
All parts ship worldwide from Guangzhou. Every product is inspected before shipping.
Frequently Asked Questions
Can I use the GMT hand for a third time zone?
Yes. With the rotating bezel, you can set the GMT hand to a third time zone by turning the bezel to a different offset.
Is the NH34 GMT hand accurate?
Yes. The NH34 is a true GMT movement with a independently adjustable GMT hand. It keeps the same accuracy as the NH35 (rated -20 to +40 seconds per day).
Do GMT watches cost more than regular watches?
Slightly. The NH34 movement costs more than the NH35, but the difference is usually $15-30 in the final watch price.
Related Articles
- NH35 vs NH34 Movement Guide — Learn the full specs of both movements
- How to Choose the Right Watch Dial — Pick the perfect dial for your GMT build