Louis Erard 1931 Collection Mechanical hand winding Black Dial Men's Watch 54209AS12.BDE03 Mechanical Hand-Winding / ETA 7001 RE9 Black dial with Regulator / Power reserve / Small seconds Anti-reflective sapphire glass with 42mm Steel Case Black rubber strap with Stainless steel folding clasp Water Resistance : 5 ATM / 50 Meters / 165 Feet