NH35, NH38, NH70: Which Seiko Movement Should You Choose for Your Mod Watch?

When you think Seiko Mod, you first think dial, strap, colours. And yet, it is the movement that truly makes the watch. It is what beats on your wrist day after day, guaranteeing accuracy and durability. You might as well choose it knowingly.

At Time2Seiko, we use several authentic Seiko movements depending on the model. Here is what really sets them apart, in plain words and without jargon.

The NH35: the safe bet

This is the reference movement of the Seiko Mod world. Automatic with a date function, it winds itself with the motion of your wrist and can also be wound manually. Its power reserve exceeds 40 hours, and its reliability is proven across millions of units.

The NH35 is perfect if you want a complete, versatile everyday watch with the date always in view. You will find it, for example, across our entire SEIKOJUST range, from the most classic to the boldest. It is a sober, discreet movement that does its job without ever letting you down.

The NH38: the open heart

The NH38 is the movement behind open-heart watches. A window cut into the dial reveals the balance wheel, that small component oscillating constantly and bringing your watch to life. You literally watch the heart of the mechanism beat before your eyes. It is both elegant and fascinating.

This movement has no date, which frees up the dial design entirely and highlights the opening. We use it on our SEIKONAUT open heart models, available in several colours. It is the ideal watch for those who want some visible mechanics without going all the way to a full skeleton.

The NH70: the skeleton

With the NH70, we go even further. The dial almost entirely disappears to make way for the bare mechanics. You see the gears, the bridge, the balance wheel, the mainspring barrel. All the complexity of an automatic movement is displayed on your wrist.

This is a watch that cannot be ignored. It is for those who love watchmaking for what it truly is: precision mechanics that deserve to be seen. Find this movement on our SEIKOAK Skeleton model.

The NH34: for travellers

We use it on certain specific models. The NH34 is a GMT movement with date, capable of displaying two time zones simultaneously thanks to an additional hand. Handy if you travel regularly, or simply if you like watches with a strong technical character.

How to choose?

One question is enough: what are you looking for in your watch?

• A complete everyday watch with date: the NH35 is made for you, found on the SEIKOJUST models.
• Watching the heart of the movement beat: go for the NH38, with our SEIKONAUT open heart.
• Fully exposed mechanics: the NH70 on the SEIKOAK Skeleton will be your favourite.
• Two time zones for travelling or standing out: the NH34 GMT.

Each movement corresponds to a specific model in our range. You are not just choosing a mechanism, you are choosing a way of living with your watch.

And if you are still hesitating, that is what our configurator is for: visualise your watch before confirming, choose your movement, your dial, your strap, and even your logo. No bad surprises.

Configure my Seiko Mod with the movement of my choice

See all our available models