Sellita SW200 vs Seiko NH35 vs Miyota 82S5: Which Affordable Automatic Movement Is Best?

Most automatic watches under about US$1,000 run on one of a handful of workhorse movements. Three come up again and again: the Swiss Sellita SW200, the Japanese Seiko NH35 and the Japanese Miyota 82 series. We use two of them, so here is an honest comparison.

The three at a glance

• Sellita SW200-1 (Switzerland): 28,800 vph (4 Hz), 38-hour power reserve, hacking seconds, hand-winding, date. A close equivalent of the classic ETA 2824-2. Used in our Elemental and Air Force 5th Generation.
• Seiko NH35 (Japan): 21,600 vph (3 Hz), around 41 hours, hacking, hand-winding, date. One of the most widely used movements in affordable watches.
• Miyota 82S5 (Japan): 21,600 vph (3 Hz), around 42 hours, hacking, hand-winding, small seconds. Used in our 125 Field and RAE 125.

Smoothness

The SW200 beats at 4 Hz, eight steps a second, so its seconds hand sweeps noticeably more smoothly than the 3 Hz Japanese calibres. If the glide matters to you, this is the clearest difference. See why automatic watches sweep.

Accuracy

Factory tolerances for the Japanese workhorses are wide, often quoted at around −20 to +40 seconds a day, though most examples perform much better once regulated. The SW200 is generally regulated more tightly; our Elemental is regulated to within ±12 seconds a day. In daily wear, a well-regulated example of any of the three is perfectly usable.

Power reserve

Close: 38 hours for the SW200, around 41 to 42 for the Japanese movements. None will survive a full weekend off the wrist, so expect to wind and set it on Monday.

Robustness and servicing

All three are built in huge numbers, which is their great strength: parts are easy to find and almost any watchmaker can service them. The Japanese movements are famously tough and cheap to replace. The SW200 shares its architecture with the ETA 2824, which watchmakers have worked on for decades.

Feel when winding and setting

The SW200 hand-winds with a firm, positive feel. The NH35's hand-winding is a little rougher. All three hack, so you can set them to the second.

Which is best?

• Smoothest sweep and the Swiss movement story: Sellita SW200.
• Lowest cost and toughest to kill: Seiko NH35.
• A clean field-watch layout with small seconds: Miyota 82S5.

There is no bad choice among the three. What matters more is that the brand tells you exactly which one is inside. More on the SW200: The Sellita SW200-1.