| Brand | ETA |
| Caliber Number | 2892-A2 |
| Base Caliber |
ETA 2892 |
| Movement Type | Automatic |
| Jewels | 21 |
| Diameter | 11 1/2”’ (25.60mm) |
| Height | 3.6mm |
| Power Reserve | 42 hours |
| Lift Angle | 51 degrees |
| Vibrations Per Hour | 28,800 (4 Hz) |
| Shock System | Incabloc |
| Regulator System | ETACHRON |
| Rotor | Ball bearing system |
| Winding Direction | Bi-directional |
| Hacking? | Yes |
| Features | Central hours, central minutes, central seconds, date |
| Country of Manufacture | Switzerland |
| Known Models | Kobold Large Soarway Diver (Too many to list, add your watch in the comments below…) |
The ETA caliber 2892-A2 is based on the original ETA caliber 2892 automatic watch movement.
Accuracy
Accuracy of the ETA caliber 2892-A2 can range from as much as +/-20 seconds per day to just +/-5 seconds/day. The accuracy that your watch experiences depends on the grade that the watch manufacturer chose to power their watches.
Grades
Similar to other ETA movements, there are 3 grades of production quality.
- Elaborated Grade – Adjusted to four positions / average accuracy of +/-5 sec/day to +/-20 sec/day.
- Top Grade – Adjusted to five positions / average accuracy of +/-4 sec/day to +/-15 sec/day.
- Chronometer (COSC) Grade – Adjusted to five positions / average accuracy of -4/+6 sec/day.
From Wikipedia:
The key components which differ at the line of demarcation between Elaborated and Top are the pallet stones, balance wheel & hairspring, and the regulator mechanism. The degree of decoration on the movement’s parts also increases with the grade. –Source
Additional Resources:
- Official 2892-A2 tech sheet here
- Shop watches with 2892-A2 here
