Patek Philippe Calatrava, Model # 5054J. 18kt yellow gold 35.4mm case with a leather strap and 18k yellow gold pin buckle. Automatic movement. White dial. Hours, minutes, small seconds, date, moonphase and power reserve indicator. (Patek Philippe offers a wide variety of color in leather straps, usually black or brown.) Also known as:Patak, Phillipe, Phillippe, 5054, 5054 J