MODEL:140.8.98S BOX & CERT DATED DEC 2005 JLC 891/448/2 movement in stainless steel case 37mm. The movement oscillates at 28,800 vph, and has 275 parts and 36 jewels. Since this is a Master Control series watch, it has completed the rigorous 1,000 hours testing regimen. The rotor for the auto winding mechanism has a 22-carat yellow gold segment mounted to its outer edge to give it the weight needed to be an efficient winder. The beautiful movement can be viewed through the transparent case back. New custom-made leather strap fitted with a stainless steel buckle.