The ETA caliber 2897 is Swiss made automatic watch movement with a power reserve indicator located between 6:00 and 8:00. This caliber has 21 jewels and beats at 28,800 vph. Official ETA documentation indicates that this movement has been available since at least April of 2005.
Some of the topics covered in the caliber listing:
ETA 2897 VS 2892A2:
The caliber 2897 is based on the 2892A2 framework, but with the addition of a power reserve indicator on the dial. These two calibers share many part numbers with each other, however, there are parts specific to the 2897 (see pdf tech sheets below)
Accuracy of the ETA caliber 2897 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.
Other calibers using 2897 as a base:
Longines uses the ETA caliber 2897 as a base movement for their caliber L602 power reserve movement. If you know of other brands that have rebranded the caliber number of the 2897, please share the information below.