The NH35: The Story of the Japanese Automatic Movement That Conquered the World

The Origins: TMI and Seiko's Legacy

The story of the NH35 caliber begins with TMI (Time Module Inc.), Seiko's division specializing in manufacturing movements for third parties. TMI was born as a strategic branch of the Japanese watchmaking giant Seiko Epson, with the aim of democratizing quality Japanese movements and making them accessible to brands worldwide.

Seiko has been perfecting the art of watchmaking for over a century. Founded in 1881 by Kintaro Hattori in Tokyo, the company pioneered numerous innovations: the world's first quartz watch (the Astron, in 1969), the first watch with an LCD display, and a long tradition of highly reliable automatic movements.

The NH35: Evolution of a Legend

The NH35 is the direct successor to the legendary 7S26 caliber, one of the most produced automatic movements in watchmaking history. TMI took everything that worked in the 7S26 and improved it in two key aspects:

• Hacking (seconds hand stop when pulling the crown): allows for precise time setting by stopping the hands' movement.
• Manual winding: the ability to wind the mainspring by hand, which the 7S26 did not allow.

These two seemingly simple improvements transformed the NH35 into the preferred movement for microbrands and independent manufacturers worldwide.

Technical Characteristics of the NH35

Why the NH35 Became the Industry Standard

1. Proven Reliability

The NH35 inherits decades of Japanese engineering. Its robust architecture makes it extremely resistant to daily use, with a lifespan that can exceed 20-30 years with basic maintenance.

2. Accessible Price

Being produced in large volumes by TMI, the NH35 has a very competitive acquisition cost, making it ideal for brands looking to offer a genuine automatic movement without skyrocketing the final price to the consumer.

3. Global Availability

TMI distributes the NH35 worldwide, ensuring a constant supply and accessible spare parts for watchmakers in any country.

4. The Microbrand Boom

With the rise of watch microbrands from the 2010s onwards, the NH35 became the heart of thousands of independent projects. Brands like Seestern, Heimdallr, Vostok-Europe, and many others adopted it as their reference movement.

The NH35 in Watch Culture

The NH35 has generated a passionate community of modding (watch modification) enthusiasts. Thanks to its compatibility with a huge variety of cases, dials, and hands, it has become the favorite movement for amateur watchmakers who build their own watches from scratch.

Forums like WatchUSeek or Reddit r/Watches are full of projects where the NH35 is the protagonist, from homage replicas to completely original designs.

The Future: NH35 and its Successors

TMI continues to evolve its movement line. The NH36 adds the day of the week in English and Japanese, while the NH38 removes the date for clean dial designs. However, the NH35 remains the most popular due to its perfect balance of functionality and simplicity.

Conclusion

The NH35 from TMI/Seiko is not just a movement: it is a symbol of the democratization of automatic watchmaking. It has allowed thousands of brands and enthusiasts to offer and enjoy the magic of a Japanese automatic mechanism, with the guarantee of quality that only decades of experience can provide.

For a brand like PANTER Watch, choosing the NH35 means offering your customers Japanese watchmaking heritage with the unique identity that sets you apart.