Cartier Stainless Steel Mecanique. The model number of this Cartier is 2390. The case measures 26mm by 39mm. Featuring a textured off white dial with black roman numeral hour markers and flat finished bezel. This Cartier is accompanied by a Cartier strap and generic buckle. The caseback is marked "Cartier Mecanique STAINLESS STEEL 60551PB 2390". The case serial is 60551PB. Condition: (Excellent).