Both of these calibers are mechanical movements, but the main difference between them is that the ETA 2824-2 is an automatic and the 2804-2 is a manual-wind movement.
Yes. Although the ETA caliber 2824-2 is essentially the automatic version of the ETA 2804-2 manual-wind movement, there are some other differences between the two. Let’s compare the differences below:
The ETA 2804-2 is 3.35mm VS the 2824-2 at 4.6mm. The difference in height is due to the automatic wind unit on the 2824-2, making it a taller movement.
The 2804-2 has 17 jewels and the 2824-2 has 25 jewels. Again, this is do to the addition of the automatic device framework.
Caliber 2804-2 has a running time of about 42 hours when fully wound. The automatic 2824-2 has a running time of about 38 hours.
The main specs that the ETA 2824-2 has in common with the 2804-2 are as follows:
Additionally, both movements are hand-windable and equipped with a hacking stop-seconds mechanism. Both use an Etachron regulator. Both use Incabloc anti-shock devices.