This is a Heuer "Autavia" chronograph from the late 1960s and 1970s. It comes with the original strap and tailpiece, and has been fully serviced by the manufacturer, at a cost of nearly $100,000 alone. In addition, the condition of the watch is excellent, and it seems that the case polish was removed when the watch was repaired by the manufacturer, so the original shape of the watch can be felt. This model is now being reissued as the current version, but it is based on this model.