Bucherer Automatic Chronograph
most likely a 2892 with a Dubuis-Depraz chronograph module

If you look closely or HOW TO SPOT A MODULAR CHRONOGRAPH
Then you see that the crown is located lower then the pushers. This is in almost every case a clear indicator, that a modular chronograph is at work. Another indicator is the date that is often shown with an internal loupe. Because the chronograph parts are mounted on top of the automatic movement, the date ring lays quite low and an outer loupe would reveal that.