The most iconic all-around automatic watch movement ever made. One calibre, four grades, four decades of service inside thousands of models — from dive watches to dress watches.
Click a part — the 3D view will fly to it
The 2824-2's popularity rests on a deceptively simple formula: a robust, serviceable, well-finished automatic with a hacking sweep seconds hand and a quickset date — at a price that let a hundred brands put "Swiss Made" on a dial.
Four teams of parts solve four problems: store energy, divide it, release it, and govern it. Every mechanical watch works this way — the 2824-2 is simply the cleanest mass-produced expression of it.
A coiled torsion spring inside a toothed drum stores ~38 hours of energy. A slipping bridle prevents over-winding — the spring can never be damaged by winding.
Four wheels and pinions (90/12, 60/8, 64/8, 70/7 teeth) reduce the barrel's one turn per 7.5 h down to a 4500:1 ratio at the escape wheel, converting spring torque into steady rotation.
The 15-tooth escape wheel and the pallet fork release energy in discrete steps — one tooth per beat. The pallet jewels lock, impulse and unlock 8 times per second.
The 4 Hz balance wheel + hairspring is the timekeeper. Each beat it returns to the escapement a precise slice of energy — and each oscillation advances the hands exactly 1/28,800 of an hour.
ETA offers the same 2824-2 in four executions. Diameter, thickness, jewels and beat rate are identical — the grade changes regulation, finishing and materials. This decides where the watch lands on the price shelf.
Top-grade parts also swap the balance (Glucydur instead of nickel-plated), the hairspring (Anachron instead of Nivarox), the shock device (Incabloc instead of Novodiac/ETACHOC) and the pallet jewels (natural red rubies instead of polyrubies). All grades share the same geometry — which is why any grade can be serviced by any watchmaker with the same parts kit.
Few movements have shaped the industry more. The 2824-2 defined the "workhorse automatic" — and its architecture lives on in the clones that now power half the microbrand world.
ETA launches the 2824-2 as the second generation of a design inherited from Eterna's 1427. It replaces the 2824 with a hacking seconds feature and refined winding — instantly becoming the default Swiss automatic.
The Swatch Group's ETA supplies the entire Swiss industry. Tissot, Hamilton, Longines, Oris, Steinhart, Marathon and hundreds of brands fit the 2824-2. It powers divers rated to 1,000 m and dress watches thinner than 7 mm.
Key design patents lapse, and the clone era begins. Manufacturers replicate the 2824-2 architecture almost exactly — the most-copied movement in modern horology.
ETA announces it will stop supplying outside the Swatch Group. The gap is filled by the clones — and by Sellita's SW200-1, built on tooling so close to the 2824-2 that parts interchange. The workhorse never died; it multiplied.
Why "most iconic all-around"? It is the rare movement that is cheap enough for a $300 microbrand, accurate enough for COSC-certified chronometers, thin enough for dress watches and tough enough for military-spec divers — one calibre, the entire market.