Bellissima 29mm Powermatic

The Tissot Bellissima Automatic watch with the SKU T126.207.16.013.00 houses the ETA Calibre C26.111 mechanical self-winding movement. It is also broadly marketed as the ETA Powermatic 48.111 movement by Tissot.
Technical Specifications
This Swiss-made caliber provides the following performance metrics:
Movement Type: Mechanical, automatic (self-winding)
Base Engine: Built upon the architecture of the reliable ETA 2671 workhorse
Power Reserve: Up to 48 hours
Core Material: Equipped with a Nivachron balance hairspring, providing enhanced resistance against magnetic fields and temperature fluctuations to preserve timekeeping accuracy
Functions: Hours, minutes, sweeping central seconds, and a date display positioned cleanly at 6 o'clockThe movement and its rotor can be seen operating first-hand through the watch's exhibition see-through case back.