History of the ETA 2892 movement and it's Clones
Putting an ETA movement into any watch ensures good service at reasonable cost. At least 95% of mechanical watches on the market in the price range between $1000 USD to $7.000 USD, are moved by some version or modification of ETA calibers. TAG Heuer, Omega, Panerai, Hamilton, IWC, Hublot, Longines, Eberhard, Corum, Nardin, GP, Baume & Mercier, Tissot .
The ETA 2892 automatic movement predates the Swatch Group that we know of today. ETA is a subsidiary of Eterna, a watch company in Switzerland and in 1961, it sought to make an exceptionally thin automatic movement. It was first named Eterna Matic 3000 Dato and Heinrich Stamm designed the movement’s gear system in 1950 which ensured its power would flow efficiently. He retired in 1969 and 10 years alter he was awarded the gold medal for his achievement by the Swiss Chronometry Association.
It is not common knowledge that quite a few of the Swiss best replica watch movements are assembled in China. And exported to North America, Asia, and even Europe. Here the brand name is more important than the “Swiss made” label. Such watches may consist of a Chinese case and a Chinese crystal. And a Taiwan-made dial and metal bracelet and Japanese hands. If the movement is to be considered Swiss, 51% of its value must be Swiss. And at least the last wheel must be added in Switzerland. Swiss watch brands without the “Swiss made” label are usually equipped with a Japanese movement. The “Swiss parts” label means that the movement is assembled in Asia. But using kits that consist at least partially of Swiss made components.
It was in 1963 when the pioneering watches that used this thin caliber was unveiled and it was then named Eterna-Matic 3000. The ball bearing winding rotor continues to be used by nearly every watch company and the caliber was first given the designation 1466, followed by 1504, this time it had a height of 3.6mm and a diameter of 29mm.
The movement was welcomed favorably and it was considered a milestone. It was very affordable and easily available for mass production.
Another ETA automatic movement, 2824, had a sandwich construction so it was noticeably thicket (height of 4.6mm) and its base movement was modified into a self-winding movement.
The new movement’s gear train created a depression due to its arrangement and the dimensions were also altered so tat the gears are flat and fit well beneath the bridges. The minute hand is powered indirectly so save space. The automatic bridge uses this space and it fits nicely between the barrel bridge and the balance bridge. Three screws secure the rotor.
The Eterna movements were widely used in the 60s and they run in 5 ball bearings. The ETA 2892-A2 which is the current form of this movement has 7 ball bearings with a diameter of 0.60mm. But the automatic winding mechanism of this new movement is less efficient compared to the 2824.
The IWC, as well as other companies using the ETA 2892 make their own rotors. There are improvements like an outer segment that has better efficiency and greater weight and it is in 21k gold.
Between 1975 and 1983, production of the caliber 2892 totaled 342,123 units. After 1983, the 2892 was named 2892-A2.