The Royal Oak 'Extra-Thin' is Audemars Piguet modern Jumbo - the design closely following the original lines as introduced with the 1972 5402. The case measures 39mm across and houses the tried & tested caliber 2121 movement. Reference 15202BA.OO,0944BA.01 has a yellow gold case with matching bracelet and a silver / white 'Grande Tapisserie' dial.
Slim (3.05mm) self-winding movement, originally created by Jaeger-LeCoultre and used by Audemars Piguet, Vacheron Constantin and Patek Philippe.