Steel Vacheron Constantin Overseas Chronograph 49150/000A-9017. Automatic chronometer movement. Case diameter 42.mm. Water resistant to 150 meters. Silver dial with baton hour markers and outer tracker minute markers, date display at the 12 position. 1/5 second center sweep chronograph, Minute Totalizer at 3 o’clock (30), Hour Totalizer at 9 o’clock (12) and small running seconds at 6 o’clock. Anti-magnetic shielded movement. Black rubber strap with steel double folding clasp. Box and papers dated November 2016. Our reference S20971.