A pillar of the Royal Oak Offshore line, this 26170ST channels Audemars Piguet's muscular chronograph language in stainless steel with the balanced presence collectors expect from the model. The silver dial keeps the 42mm case crisp and architectural, emphasizing the Offshore's angular case construction. Its automatic movement delivers chronograph and date functionality. At 14.3mm thick, it wears with the assertive proportions that define the Offshore.