Automatic GMT - NH34
A reliable Japanese automatic GMT movement that allows you to track a second time zone using an independently adjustable 24-hour GMT hand. The NH34 is ideal for travelers and GMT-style watches, combining dependable automatic performance with practical dual-time functionality.
The TMI NH34 is an automatic mechanical GMT movement developed by TMI (Time Module Inc., part of the Seiko Group). Based on the trusted NH series architecture, it features manual winding, hacking seconds, and a dedicated 24-hour GMT hand for tracking a second time zone.
|
Specification |
Details |
|---|---|
|
Manufacturer |
TMI (Seiko Group) |
|
Caliber |
NH34 |
|
Movement Type |
Automatic GMT with Manual Winding |
|
Functions |
Hours, Minutes, Seconds, 24-Hour GMT Hand, Date |
|
Jewels |
24 Jewels |
|
Beat Rate |
21,600 BPH (3 Hz) |
|
Power Reserve |
Approx. 41 Hours |
|
Diameter |
27.40 mm |
|
Height |
5.32 mm |
|
Accuracy |
-20 / +40 seconds per day |
|
Hacking Seconds |
Yes |
|
Country of Origin |
Japan or Malaysia |
Operating Instructions
Automatic Winding
The NH34 automatically winds itself through the natural movement of your wrist while worn.
Manual Winding
If the watch has stopped:
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Turn the crown clockwise approximately 55 times to fully wind the mainspring.
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The watch will continue winding automatically while being worn.
Setting the Time
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Pull the crown to the second click.
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Turn the crown until the correct local time is displayed.
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The second hand stops while setting the time for precise synchronization.
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Push the crown back to the normal position.
Setting the GMT Hand & Date
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Pull the crown to the first click.
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Turn the crown in one direction to adjust the 24-hour GMT hand.
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Turn the crown in the opposite direction to adjust the date.
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Push the crown back once finished.
Important: Do not change the date between 9:00 PM and 4:00 AM, as the calendar mechanism may be engaged.
Using the GMT Function
The additional 24-hour GMT hand allows you to track a second time zone.
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Set the main hour and minute hands to your local time.
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Adjust the GMT hand to the second time zone you wish to monitor.
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Read the GMT hand against the 24-hour bezel or chapter ring to distinguish between AM and PM.
This function is ideal for travelers, business professionals, and anyone communicating across different time zones.
Care & Maintenance
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Wear the watch regularly to keep the movement wound.
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If not worn for several days, manually wind before use.
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Avoid strong magnetic fields and severe impacts.
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Keep the crown fully pushed in (or screwed down if applicable).
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Professional servicing is recommended every 5–7 years, depending on usage and environmental conditions.
Why Choose the NH34?
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Genuine Japanese automatic GMT movement
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Tracks a second time zone with a dedicated 24-hour GMT hand
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Manual winding capability
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Hacking seconds for precise time setting
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Approximately 41-hour power reserve
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Durable and reliable NH-series architecture
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Ideal for travel and everyday use
The TMI NH34 combines the trusted reliability of the NH series with the practicality of a GMT complication, making it an excellent choice for travelers and watch enthusiasts who want to monitor multiple time zones with ease.