Dubois Dépraz 4900

The 4900 is a hand-winding chronograph module with annual calendar manufactured by Dubois Dépraz. It measures 30mm in diameter and 7.3mm in total thickness. The module adds a 60-second center chronograph counter alongside 30-minute and 12-hour counters, a small seconds hand, big date, and month display. An optional flyback function is available. This module has been fitted to various base movements for chronograph collections.