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Movements
Seiko NH34 GMT Automatic Movement: An Overview
Jan
The Seiko NH34 is a relatively new addition to Seiko’s popular NH series of automatic movements. Designed to cater to the growing demand for affordable GMT (Greenwich Mean Time) watches, the NH34 builds on the reliability and robustness of its predecessors while adding a useful GMT complication. This movement is ideal for travelers, frequent flyers, or anyone who needs to track multiple time zones simultaneously. Below is a detailed look at the Seiko NH34, its features, and how it compares to other movements in the NH series.
Key Features of the Seiko NH34
- GMT Functionality
The standout feature of the NH34 is its GMT complication, which allows the wearer to track a second time zone. The movement includes an additional 24-hour hand that rotates once every 24 hours, independent of the standard hour, minute, and second hands. This makes it easy to keep track of home time while traveling. - Hacking and Hand-Winding
Like other movements in the NH series, the NH34 features hacking (the second hand stops when the crown is pulled out) and hand-winding capabilities. These features enhance usability and precision, allowing the wearer to set the time accurately and keep the movement running even when not worn. - Power Reserve
The NH34 offers a power reserve of approximately 41 hours, which is consistent with other movements in the NH series. This means the watch will continue running for nearly two days if not worn. - Beat Rate
The movement operates at a frequency of 21,600 vibrations per hour (vph), or 3 Hz. This is standard for entry-level automatic movements and ensures a smooth sweep of the second hand. - Durability and Reliability
The NH34 is built to Seiko’s high standards of durability and reliability. It is designed to withstand daily wear and tear, making it suitable for tool watches and travel watches alike. - Date Function
The NH34 includes a date display, which can be adjusted independently of the GMT hand. This adds to the movement’s practicality for everyday use. - Rotor Noise
Like other NH movements, the NH34 has a relatively quiet rotor, ensuring a more refined wearing experience compared to some competing movements.
Specifications at a Glance
- Type: Automatic with GMT function
- Power Reserve: ~41 hours
- Beat Rate: 21,600 vph (3 Hz)
- Hacking: Yes
- Hand-Winding: Yes
- Jewels: 24
- Height: ~5.32 mm (slimmer than the NH35)
- GMT Hand: Independent 24-hour hand
- Date Function: Yes
Comparison with Other NH Movements
| Feature | NH34 (GMT) | NH35 (Standard) | NH36 (Day-Date) |
|---|---|---|---|
| GMT Function | Yes | No | No |
| Date Display | Yes | Yes | Yes |
| Day Display | No | No | Yes |
| Hacking | Yes | Yes | Yes |
| Hand-Winding | Yes | Yes | Yes |
| Power Reserve | ~41 hours | ~41 hours | ~41 hours |
| Beat Rate | 21,600 vph | 21,600 vph | 21,600 vph |
| Height | ~5.32 mm | ~5.32 mm | ~5.32 mm |
Advantages of the NH34
- Affordable GMT Option
The NH34 is one of the most affordable automatic GMT movements on the market, making it accessible to microbrands and watch enthusiasts who want GMT functionality without breaking the bank. - Versatility
The independent GMT hand and date function make the NH34 highly versatile, suitable for both everyday wear and travel. - Proven Reliability
As part of the NH series, the NH34 benefits from Seiko’s reputation for producing reliable and durable movements. - Slim Profile
At ~5.32 mm in height, the NH34 is relatively slim, allowing watchmakers to design more compact and comfortable GMT watches.
Disadvantages of the NH34
- No True “Traveler’s GMT”
The NH34 is a “caller’s GMT” movement, meaning the GMT hand is adjusted independently of the local hour hand. In a true “traveler’s GMT,” the local hour hand can be adjusted independently, which is more convenient for frequent travelers. However, this is a common limitation in affordable GMT movements. - Limited Availability
As a newer movement, the NH34 is still gaining traction and may not be as widely available as the NH35 or NH36.
Watches with Seiko NH34 GMT Movements
Conclusion
The Seiko NH34 is a game-changer in the affordable GMT watch market. It combines Seiko’s renowned reliability with the practicality of a GMT complication, making it an excellent choice for travelers and watch enthusiasts alike. While it may not have the advanced features of high-end GMT movements, its affordability, durability, and functionality make it a standout option in its price range. Whether you’re looking for a travel companion or a versatile everyday watch, the NH34 is a movement worth considering.
