The NH70: The Movement That Makes Time Visible

Some watches tell time. This one shows you how.

The Most Honest Display in Watchmaking

A closed dial hides everything. The NH70 shows you everything. This is the movement inside our skeleton watches — a Japanese automatic caliber that does something most watchmakers keep behind closed doors: it lets you watch it work.

The open-heart complication is a window cut directly into the dial. Through it, you see the balance wheel oscillating at 21,600 vibrations per hour — a tiny mechanical pendulum that divides time into precise, equal fractions. It doesn't need a battery. It doesn't need a signal. It runs on the energy of motion, stored in a mainspring wound by the movement of your wrist.

What Makes the NH70 Special

The NH70 is a 21-jewel automatic movement engineered by Seiko Instruments Inc., one of the most respected movement houses in Japan. It carries a 41-hour power reserve — among the highest in its class — meaning your watch keeps running almost two full days after you take it off. The movement is self-winding: every natural motion of your wrist transfers through a rotor that winds the mainspring, so you never need to touch a crown just to keep it alive.

At 21,600 vibrations per hour, the NH70 strikes a balance between accuracy and power efficiency. The lower beat rate also makes the oscillation of the balance wheel more visible to the eye — which matters when the entire point is letting you see the movement work.

Why We Built Around the Open-Heart Complication

There's a reason skeleton watches exist. The mechanics of a mechanical movement are genuinely beautiful — gears meshing, a spring unwinding, energy transferring through a series of precisely calibrated components. Hiding that behind an opaque dial is like covering a work of art with a sheet.

The NH70's open-heart window is positioned at 9 o'clock, where the balance wheel oscillates with a rhythm you can actually see. It's hypnotic in the right light. It's the kind of detail that starts conversations. And unlike many "skeleton" watches that show hollow plastic architecture, the Valusis Volt exposes real mechanical movement — because the movement is real enough to show.

The Volt Collection: Mechanics You Can Watch

The Valusis Volt series was designed around the NH70. Every element of the case and dial was chosen to complement what's visible through that window: a dial aesthetic that frames rather than dominates, a case profile that sits confidently on the wrist, and hands that read cleanly without competing with the spectacle beneath them.

We offer the Volt in multiple colorways — each one a different statement, same movement underneath. Green dial for a bold, contemporary edge. Turquoise for something cooler, more collected. Every version powered by the same 41-hour, 21-jewel caliber.

No Markup for the Spectacle

Open-heart complications often carry a price premium that has nothing to do with the movement and everything to do with perceived exoticism. We disagree with that entirely. The NH70 is excellent. The open-heart window enhances it. Neither of these things should cost you twice what the watch is worth.

At Valusis, the movement is real, the price is honest. You're not paying for the story of skeleton watchmaking — you're paying for a 21-jewel Japanese automatic that lets you see every second tick by. That's value. That's what we charge for.

Mechanics Worth Watching

Every glance at your wrist becomes something more when you can see the gears turning. The NH70 doesn't just keep time — it reminds you that your watch is alive, mechanical, and working. That's the Volt experience.

Because a watch that shows its work deserves to be worn by someone who appreciates it.

Discover the Volt collection — mechanics you can see, price that makes sense.