NH35 vs NH34 Movement Guide: Which Seiko Movement Should You Choose?
What Are NH35 and NH34 Movements?
Getting into Seiko mod builds or shopping for a custom automatic watch? You will hear about the NH35 movement and the NH34 movement constantly. Both are made by Seiko Instruments Inc (SII) and power thousands of budget automatic watches worldwide — but they serve different purposes.
The NH35 is a 3-hand date movement — the workhorse behind most everyday automatic watches. The NH34 adds a 4th hand (GMT hand) for tracking a second time zone.
At Funny Items, we build watches around both movements. Here is how to pick the right one.
NH35 Movement: The Everyday Workhorse
The NH35 movement is the go-to for most watch modding projects. It is affordable, reliable, and easy to service.
Key specs:
- 21,600 vibrations per hour (vph)
- 41-hour power reserve
- Date display at 3 o'clock (or 4 o'clock depending on case)
- Automatic and hand-winding
- Hacking seconds
This is the movement inside most of our Sub-style dive watches and dress watches. For example, our 43.5mm Relax Automatic Watch With NH35 Movement and Vintage Bronze Watch both use this proven calibre.
If you are building your first custom watch or buying a reliable daily wearer, the NH35 is the safe choice. Parts are everywhere. Every watch dial, watch case, and hand set on our site is NH35-compatible.
NH34 Movement: The GMT Builder
The NH34 movement is the GMT version of the NH35 family. It adds a 4th hand that rotates once every 24 hours, giving you a second time zone at a glance.
Key specs:
- Same 21,600 vph and 41-hour power reserve as NH35
- GMT hand (4th hand) for dual time tracking
- Date display
- Automatic and hand-winding
- Hacking seconds
The NH34 powers all our GMT watches. Models like Pepsi NH34 GMT, Batman NH34 GMT, and Meteorite NH34 GMT Watch With High Quality Bezel use this movement.
If you travel frequently or just love the look of a GMT watch, the NH34 is the one you want.
Side-by-Side Comparison
| Feature | NH35 | NH34 |
|---|---|---|
| Hands | 3 (hour, minute, second) | 4 (hour, minute, second, GMT) |
| Date | Yes | Yes |
| GMT function | No | Yes |
| Power reserve | 41 hours | 41 hours |
| Vibration rate | 21,600 vph | 21,600 vph |
| Hacking | Yes | Yes |
| Hand-winding | Yes | Yes |
| Best for | Daily wear, dive watches | Travel, GMT builds |
| Price range | Lower | Higher |
Which Movement Should You Choose?
Choose the NH35 if:
- You want a simple, reliable automatic watch for daily wear
- You are building a Sub-style diver or dress watch
- You want the widest range of compatible watch parts
- Budget matters
Choose the NH34 if:
- You want GMT / dual time zone functionality
- You travel across time zones
- You are building a GMT Pepsi, Batman, or similar style
- You want that 4th hand look
Build Your Watch With Funny Items
Whether you go NH35 or NH34, Funny Items has everything you need to build your perfect watch:
- Dials — from vintage sunburst to matte black, NH35 and NH34 options
- Cases — 31mm, 39mm, 40mm, 43.5mm in stainless steel and vintage bronze
- Hands — full sets, individual hands, and specialty designs
- Straps — rubber, fluororubber, stainless steel bracelets, quick-release
- Complete watches — fully assembled and tested
Browse our collections:
- Sub Diver Watches — classic dive-style builds with NH35
- GMT Watches — dual time zone watches with NH34
- Dress Watches — clean, elegant automatic watches
- Vintage Bronze Watches — aged bronze cases with NH35 or NH34
Frequently Asked Questions
Can I swap an NH34 into a watch that originally had an NH35?
In most cases yes, if the case and dial support a 4th hand. Check the case and dial specifications before buying.
Do the NH35 and NH34 use the same crown position?
The stem height and crown position depend on the case, not the movement. Make sure your watch case is compatible.
How accurate are these movements?
Both are rated at -20 to +40 seconds per day. Many builders regulate them to within +/-10 seconds. Funny Items watches are tested before shipping.