Absolutely Super Rare AP Royal Oak Offshore 57th Street Rubber Clad Chronograph Special Limited Boutique Edition of 250 pieces! 
This watch was produced in 2010 to commemorate AP's NY Boutique opening in late 2009 and was exclusively available only out of this Flagship location.
Stunning contrast between the 18K Rose Gold numerals & markers, the Black Waffle Dial and the Stainless Steel/Rubber Clad case. 
Case back engraved with Royal Oak Offshore - Limited Edition - 57th Street
Even more unique is the AP black alligator hornback strap (with off-white/gold contrast stitching)
This strap is absolutely unique to this specific model.
Water resistant to 100 meters / 330 feet