NH35 movement: the mechanical heart of your A★Star watches
An automatic watch is pure mechanics. No battery, no external power source—just a spring, gears, and a rotor that winds with the movement of your wrist. The movement is the heart of the watch. At A★Star, this heart is called the NH35.
What is an automatic movement?
An automatic movement operates using the kinetic energy from your body. A rotor oscillates with your movements and continuously winds the mainspring. As long as you wear the watch regularly, it won't stop.
It's a mechanical object in a digital world. Every beat is visible, audible, real. Many enthusiasts consider a watch that doesn't beat mechanically not truly a watch.
Why the NH35?
The NH35 is manufactured in Japan under rigorous industrial quality conditions. It is one of the most reputable automatic movements in its category—used by hundreds of manufacturers worldwide for a simple reason: it works, and it lasts.
24 Jewels Jewels are friction bearings used at the most stressed contact points of the movement. They reduce mechanical wear and extend the caliber's lifespan. 24 jewels is a remarkable number for this price point.
72-hour power reserve Take off your watch on Friday evening—it will still be running on Monday morning. This reserve frees you from the obligation of wearing it constantly.
Controlled precision The NH35 allows a tolerance of -10 to +30 seconds per day under normal conditions. We enforce a tolerance of -15 to +15 seconds during our timegrapher checks—a precision superior to the manufacturer's specifications.
Transparent sapphire case back The case back of our watches reveals the NH35 in action. The oscillating rotor, the gears, the mechanical architecture—a spectacle accessible every time you turn your watch over.
Automatic vs. Quartz: Do you have to choose?
Quartz is more accurate in the short term—a few seconds per month versus a few seconds per day for an automatic. But quartz needs a battery. Automatic needs movement. And automatic has a soul that quartz does not.
