AW21 904L Series
 
904L : Highest Grade of Stainless Steel often used for high end luxury watches .
 
Composition : Nickel, 23–28% Chromium, 19–23% Carbon, 0.02% maximum Copper, 1–2% Molybdenum, 4–5% Manganese, 2% maximum Silicon, 1.0% maximum
 
Materials: 100% Cotton