US$：21000
Product_no：R-4102
Style：Audemars Piguet Royal Oak 77321ST.ZZ
Surface：92%
Case：Stainless steel, diameter 33mm; Sapphire crystal; waterproof up to 50m
Bracelet：Stainless steel bracelet, fold-over deployant clasp
Functions：Hour, minute, second and date display
Dial：Black
Movement：Automatic Mechanical
Papers：Yes
Boxes：Yes