The ETA 2836-2 caliber is one of the most well-known and widely used Swiss-made movements currently.
It is a highly comprehensive 25-jewel automatic mechanical movement that includes manual winding and hacking seconds functions.
It also features a complete calendar that displays both the day of the week and the date of the month.
In this article, we will provide a complete overview of all the specifications of the ETA 2836-2 and compare it with other similar calibers.
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✚ ETA 2836-2 – Technical Specifications
| Manufacturer | ETA |
|---|---|
| Model | 2836-2 |
| Movement | Automatic |
| Jewels | 25 |
| Vibration Frequency | 28,800 vph (vibrations per hour) |
| Power Reserve | 42 hours |
| Dimensions | 25.6 mm x 5.05 mm (Diameter x Depth) |
| Precision | +-12 / +-7 / +-4 sec. per day (depending on finishing) |
| Functions | Hours, minutes, and seconds in central hands, and calendar with day of the week |
| Hacking Seconds | Yes |
| Manual Winding | Yes |
✚ How Does It Work?
The ETA 2836-2 is essentially a variation of the ETA 2824 caliber; the only difference is that the 2836-2 can display the day of the week, not just the date of the month as the 2824 does. 
As it is the same mechanism, most of its parts are interchangeable, and the specifications are almost identical.
Therefore, it is also an automatic movement with a bidirectional rotor mounted on a ball bearing.
It also includes the Novodiac shock protection system from Incabloc to protect it from shocks and falls, as well as the Etachron regulator for easier and more precise movement adjustment.
The precision and power reserve specifications are the same, and it also features manual winding and hacking seconds.
For more operational details and specifications, you can take a look at the ETA 2824 features.
✚ Brands Currently Using ETA 2836-2
ETA is part of the Swatch Group, a large business conglomerate that owns a significant portion of the most well-known watch brands.
Brands like Omega, Tissot, Hamilton, Rado, Certina, Longines, and Mido, among many others, are part of the group. Therefore, it is very common to find ETA movements in all of them, including the 2836-2.
Here are some of the brands and models that use the mentioned ETA 2836-2:
➤ Tissot Visodate
The Tissot Visodate is a clear example of a Swiss watch with the ETA 2836-2 caliber, which is used without any modifications other than the rotor.
It is also one of the most affordable Swiss watches that can be found with this movement.
| Crystal | Sapphire |
| Movement | Automatic mechanical |
| Caliber | ETA 2836-2 |
| Case Diameter | 40 mm |
| Case Thickness | 11.6 mm |
| Materials | Stainless steel |
| Water Resistance | 3 ATM (30 meters) |
➤ Swiss Alpine Military
Another affordable Swiss watch with the 2836-2 is the Swiss Alpine Military, a much sportier and robust military-style watch capable of withstanding up to 10 atmospheres of pressure.
| Crystal | Sapphire |
| Movement | Automatic mechanical |
| Caliber | ETA 2836-2 |
| Case Diameter | 43 mm |
| Case Thickness | 11.3 mm |
| Materials | Stainless steel |
| Water Resistance | 10 ATM (100 meters) |
➤ Certina DS-8
The Certina DS-8 features an ETA Powermatic 80 caliber, which is basically a modified 2836-2 with a reduced frequency (from 28,800 vph to 21,600 vph) to increase its power reserve to 80 hours.
| Crystal | Sapphire |
| Movement | Automatic mechanical |
| Caliber | ETA Powermatic 80 |
| Case Diameter | 39 mm |
| Case Thickness | 10.45 mm |
| Materials | Stainless steel and leather |
| Water Resistance | 10 ATM (100 meters) |
➤ Mido Ocean Star
Mido names the Powermatic 80 as Caliber 80, but it is the same movement, hence an improved 2836-2 to achieve that 80-hour power reserve.
| Crystal | Sapphire |
| Movement | Automatic Mechanical |
| Caliber | ETA Caliber 80 |
| Case Diameter | 42.5 mm |
| Case Thickness | 11.75 mm |
| Materials | Stainless Steel |
| Water Resistance | 20 ATM (200 meters) |
➤ Fortis F43
Regardless of the watch’s value, the 2836-2 is also present in more luxurious brands. A good example of this is the Fortis F-43.
| Crystal | Sapphire |
| Movement | Automatic Mechanical |
| Caliber | ETA 2836-2 |
| Case Diameter | 43 mm |
| Case Thickness | 13 mm |
| Materials | Stainless Steel and Leather |
| Water Resistance | 20 ATM (200 meters) |
✚ ETA 2836-2 vs ETA 2824-2
As shown in this table, both models are identical in specifications except for a difference of only half a millimeter in thickness, which is normal considering that the 2836-2 incorporates an additional complication to display the day of the week.
| Model | 2836-2 | 2824-2 |
|---|---|---|
| Jewels | 25 | 25 |
| Vibration Frequency | 28,800 vph | 28,800 vph |
| Power Reserve | 42 hours | 42 hours |
| Dimensions | 25.6 x 5.05 mm | 25.6 x 4.6 mm |
| Precision | +-12 / +-7 / +-4 sec. per day | +-12 / +-7 / +-4 sec. per day |
| Stop Second Device | Yes | Yes |
| Manual Winding | Yes | Yes |
✚ Time and Date Setting
The adjustments are made very similarly to the ETA 2824, and they only differ in the date where the 2836-2 has an additional adjustment.
- Time: pull the crown outwards to the outermost position (2 clicks or jumps), the second hand will stop due to the stop-second or hacking function. Then simply rotate it to reach the desired time.
- Date: pull the crown to the first position (1 click). Then rotate it clockwise to advance the date and counterclockwise to change the day of the week. Do not adjust the date when the hands are between 9 PM and 3 AM to avoid damage to the mechanism.
- Manual Winding: without pulling out the crown, rotate it clockwise. For watches with a screw-down crown, it is necessary to unscrew it first in the opposite direction before winding.
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Last update of links and images on 2024-10-29.
