Sellita · Switzerland · Spécial, Prémium, Chronomètre
Sellita SW330-2
The SW330-1 was introduced in 2015 as part of Sellita's SW300 family — the SW300 series being itself derived from the ETA 2892-A2 platform. The SW330-1 was a functional clone of ETA's 2893-2, the GMT-equipped variant of the 2892-A2. In July 2020 Sellita announced the SW330-2, redesigning six components in the GMT wheel-train for more reliable quick-setting; a subsequent barrel upgrade (RDM+) pushed power reserve from 42 to 56 hours.
The SW330-2 uses an Office/Caller GMT architecture, in which the central 24-hour hand is independently adjustable from the local-hour hand. This contrasts with traveler/flyer GMT designs, where the local-hour hand is independently adjustable, and mirrors the ETA 2893-2's own second-time-zone 24-hour-hand approach. With 25 jewels — compared to 21 in the ETA 2893-2 — Sellita slightly improved the jewel count over its inspiration.
The movement gained wide adoption among independent Swiss watch brands after ETA (Swatch Group) progressively restricted outside movement sales from the mid-2000s onward, accelerating through the 2010s. It is offered in three finishing grades: Spécial (Elaboré), Prémium (Top), and Chronomètre (COSC), and has appeared in models from Christopher Ward, UNIMATIC, and others seeking an affordable, Swiss-made automatic GMT with genuine independent hand-setting.
Hz
Jewels
Reserve
In catalog
Technical specification
| Manufacturer | Sellita |
| Origin | Switzerland |
| Type | Automatic |
| Beat rate | 28,800 bph · 4 Hz |
| Jewels | 25 |
| Power reserve | 56 h |
| Diameter | 25.6 mm |
| Height | 4.1 mm |
| Hacking seconds | Yes |
| Hand-winding | Yes |
| Date | Yes |
| GMT | Yes |
| Chronograph | No |
| Accuracy (stated) | ±5 s/day avg (Spécial); ±4 s/day avg (Prémium); COSC (Chronomètre) |
| Based on | ETA 2893-2 |
1 model
Watches with this caliber
FAQ
Is the Sellita SW330-2 automatic or manual?
The Sellita SW330-2 is an automatic (self-winding) movement: a rotor winds the mainspring from the motion of your wrist, so it needs no battery. It can also be wound by hand via the crown.
What is the power reserve of the Sellita SW330-2?
About 56 hours on a full wind — into a second day, so it keeps running overnight off the wrist. Power reserve is how long the Sellita SW330-2 keeps running once you stop wearing or winding it.
Does the Sellita SW330-2 hack (stop the seconds when you set it)?
Yes. Pulling the crown stops the seconds hand, so the Sellita SW330-2 can be set precisely to a reference time before you push the crown back in. Hacking is what lets you sync several watches — or a watch and a phone — to the exact second.
Does the Sellita SW330-2 have a date function?
Yes — the Sellita SW330-2 can drive a date display, though whether a given watch actually shows the date depends on the dial the maker chose, so check the individual model rather than the movement.
How accurate is the Sellita SW330-2?
The Sellita SW330-2 is rated at ±5 s/day avg (Spécial); ±4 s/day avg (Prémium); COSC (Chronomètre). That is a normal working range for an uncertified mechanical movement; a COSC-certified chronometer is held to a tighter −4/+6 s/day, and a watchmaker can usually regulate one closer. Real-world accuracy still depends on how each watch is regulated, worn, and serviced.
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