Ingersoll 522

The Ingersoll caliber 522 is an automatic movement manufactured in China. It features a magic lever winding system with a ball-bearing rotor and offers a power reserve of approximately 30 hours. While the dial layout resembles a chronograph with pushers and subdials, these actually control a day-date complication and 24-hour indicator rather than timing functions. The movement powers the Ingersoll Bison No. 10 and Bison No. 29 reference models.