Brand: Audemars Piguet Series: Royal Oak Tourbillon Extra-Thin Openworked Model Number: 26518ST.OO.1220ST.01 Material: Stainless Steel Case Size: 41 mm Case Shape: Octagonal Bezel: Stainless Steel Movement: Manual-Wind Dial Color: Skeleton Dial Type: Analog Band Material: Stainless Steel Gender: Men’s