Sellita's SW200 and SW300 are built to the same designs as ETA's 2824 and 2892, with the same size, the same beat rate and largely interchangeable parts. The differences are small, and a well-regulated example of either will serve you just as well.
Look at the spec sheet of almost any Swiss automatic watch under $3,000 and you'll find one of two names: ETA or Sellita. Forum threads have argued for years about which is better, whether one is a cheap copy of the other, and whether it should change what you buy. Most of that argument misses how closely the two are related.
We use both. Wren's first watch ran a Sellita, our titanium diver runs an ETA, and the Diver 38 is moving from one to the other. So this is a question we've had to think through properly, not just repeat what the forums say.
Where Sellita came from
For decades, ETA was the engine supplier to much of the Swiss watch industry. Its 2824 automatic dates back to the early 1970s, and the slimmer 2892 followed. Brands that didn't make their own movements simply bought ETAs.
Sellita, founded in 1950 in La Chaux-de-Fonds, was one of the companies that assembled those ETA movements for other brands. It knew the 2824 inside out.
Then ETA's parent, the Swatch Group, began restricting sales to brands outside the group in the early 2000s. Independent brands suddenly faced the prospect of losing their movement supply. Around the same time the original 2824 patents had expired, so Sellita built its own version: the SW200, launched around 2003. The SW300, its version of the 2892, followed.
That's why people call Sellitas "clones." It isn't an insult. They're built to a proven, decades-old design, by a company that spent years assembling the original.
The movements side by side
Each Sellita has an ETA twin. Here's how the two pairs compare.
The everyday automatic: ETA 2824 vs Sellita SW200
| Spec | ETA 2824-2 | Sellita SW200-1 |
|---|---|---|
| Size | 25.6 x 4.6mm | 25.6 x 4.6mm |
| Beat rate | 28,800 vph | 28,800 vph |
| Jewels | 25 | 26 |
| Power reserve | 38 to 40 hrs | 38 to 41 hrs |
| Newer version | None | SW200-2: 65 hrs |
The slim automatic: ETA 2892 vs Sellita SW300
| Spec | ETA 2892-A2 | Sellita SW300-1 |
|---|---|---|
| Size | 25.6 x 3.6mm | 25.6 x 3.6mm |
| Beat rate | 28,800 vph | 28,800 vph |
| Jewels | 21 | 25 |
| Power reserve | 42 hrs | 42 hrs |
| Newer version | None | SW300-1: 56 hrs |
The extra jewels in the Sellitas are mostly there to support the mainspring barrel. The real spec differences are in Sellita's newer versions: the SW300-1 now runs 56 hours against the 2892's 42, and the SW200-2, launched in 2026, runs 65 hours against the 2824's roughly 40. Either way, the watch now survives a full weekend off the wrist instead of a day and a half.
We go deeper on that second pair in Sellita SW300 vs ETA 2892.
So what's actually different?
- Accuracy: both come in several grades, from standard up to chronometer. A top-grade Sellita and a top-grade ETA perform alike. What matters is the grade the brand buys and how well the watch is regulated, not the name on the rotor.
- Supply: this is the biggest practical difference for a brand. Sellita sells freely to independent brands. ETA supply outside the Swatch Group has been limited for years, which makes it harder to plan production around.
- Service: both are among the most common movements in the world. Any competent watchmaker can service either one, and parts are easy to find.
- Price: Sellitas have tended to cost brands a little less, which is part of why they're now so common in microbrand and mid-priced watches.
If you're choosing between two watches and the only difference is ETA or Sellita, choose on everything else.
And La Joux-Perret?
There's now a third name on Swiss spec sheets: La Joux-Perret, or LJP. It's a Swiss movement maker in La Chaux-de-Fonds, owned by Citizen since 2012.
Its best-known calibre for brands like ours is the G100, introduced around 2022. Unlike the Sellitas, it isn't a copy of an ETA design. LJP built it fresh, but sized it to fit the same cases as the ETA 2824, so brands can swap it in.
| Spec | ETA 2824 | Sellita SW200 | LJP G100 |
|---|---|---|---|
| Design | Original | Copy of 2824 | New |
| Height | 4.6mm | 4.6mm | 4.45mm |
| Power reserve | 38 to 40 hrs | 38 to 41 hrs (65 on SW200-2) | 68 hrs |
The headline is the 68-hour power reserve, nearly double the classic 2824, in a movement slightly thinner. It's a strong option, and it's one reason the old ETA-or-Sellita question is getting more interesting. Sellita has answered with its own longer-running versions: the 56-hour SW300-1 and the 65-hour SW200-2.
Why we moved the Diver 38 to Sellita
Sellita isn't new to us. The steel Diver One has run the SW200 since our very first watch. The Diver One Titanium uses the ETA 2824.
The Diver 38 launched with the ETA 2892-A2, and every Diver 38 shipped before November 2026 has one. Watches shipping from November 2026 have the Sellita SW300-1, with limited exceptions.
We made the change for two reasons. The first is supply: we want to know the movements will be there when a batch is due. The second is the newer SW300-1's 56-hour power reserve, against the 2892's 42. Otherwise the two are almost identical in size and specs, so the watch itself doesn't change.
Whichever movement your watch has, we recommend a service every five to seven years.
Questions people ask
Is Sellita as good as ETA?
Yes. The SW200 and SW300 are built to the same designs as the ETA 2824 and 2892. Grade and regulation matter far more than the brand of movement.
Is a Sellita a copy of an ETA?
In design, yes. Sellita built its versions after the original ETA patents expired, and it had assembled ETA movements for other brands for years before that.
What is the Sellita equivalent of the ETA 2824?
The SW200-1. The SW300-1 is the equivalent of the slimmer ETA 2892-A2.
Can a watchmaker service a Sellita?
Yes. Sellitas are among the most common Swiss movements, and any competent watchmaker can service one.
What is La Joux-Perret?
A Swiss movement maker owned by Citizen. Its G100 fits the same cases as the ETA 2824 but is its own design, with a 68-hour power reserve.
Which movement is in my Wren?
The steel Diver One uses the Sellita SW200, the Diver One Titanium the ETA 2824, and the Diver 38 the ETA 2892-A2 on watches shipped before November 2026 and the Sellita SW300-1 from November 2026, with limited exceptions.
Sources
- Sellita SW200 as an ETA 2824 alternative (Sellita history and SW200 vs 2824 specs)
- Sellita SW300 family (SW300-1 specs and the 56-hour version)
- Sellita introduces the SW200-2 with 65-hour power reserve (SW200-2 power reserve)
- La Joux-Perret G100, L100 and D100 (G100 specs and Citizen ownership)
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