Eta 2824 2 Vs 2804 2 Movements

ETA Caliber 2824-2 VS 2804-2

Eta 2824 Vs 2804

What is the difference between ETA caliber 2824-2 and 2804-2?

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.

Any other differences?

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.

Power Reserve

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.

What about similarities?

The main specs that the ETA 2824-2 has in common with the 2804-2 are as follows:

  • Linges: 11.5”’
  • Diameter: 25.6mm
  • Hands: Both have central hours, minutes, and seconds
  • Features: Both have a date at 3:00
  • Vibrations Per Hour: 28,800 bph
  • Lift Angle: 50 degrees
  • Dial Feet Location: Same

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.

Dial Side Compared:

Eta 2824 Vs 2804 Dial Side

Additional Resources:

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Omega Caliber 3888 Watch Movement | Caliber Corner
3 years ago

[…] More Omega watch calibers […]

2 years ago

The 2804-2 in my 10 year old Khaki still runs +5-6spd and has never been serviced. It became heavily magnetized several years ago to run about +45 and fully recovered after simple demag procedure. Classic workhorse. I hope the are just as reliable 10 years from now.

1 year ago

The ETA 2804-2, which i purchased 2005, has finally crashed, and need some parts to refurbish, can I use the parts from movement ETA 2824-2 minus the rotor. Hamilton khaki field officer. Thanks

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