Basic Information
Number :	15500ST.OO.1220ST.01
Brand :	Audemars Piguet
Series :	Royal Oak
Movement Type :	Automatic machinery
Mechanism：	Japanese Mechanism、 Swiss Mechanism
Appearance
Case diameter :	41.0mm
Case Thickness :	10.4mm
Dial Color :	Blue
Strap Color :	Silver
back :	Back transparent, anti-glare sapphire crystal glass
Material
Case Material :	904L Stainless Steel
Strap Material :	904L Stainless Steel
Glass material :	Sapphire Crystal Glass
Bezel Material :	904L Stainless Steel
Function
Date Display :	Yes
Timing ：	No
Week display ：	No

The blue dial of this 41mm Selfwinding Royal Oak offers new subtle details: wider indexes, a minute train printed on the external area, and a date window further away from the centre.

Stainless steel case, glareproofed sapphire crystal and caseback, screw-locked crown.

Blue dial with “Grande Tapisserie” pattern, white gold applied hour-markers and Royal Oak hands with luminescent coating.