About This Watch: This Raymond Weil Maestro Phase de Lune 2839-STC-00209 has a mechanical movement with automatic winding and a moon phase function. It features a black dial and a scratch resistant sapphire crystal. Its finely crafted 39.50 mm case is made out of stainless steel. This watch is water resistant up to 50 meters; 165 feet; 5 atm.