Jaeger-LeCoultre Master Ultra Thin Power Reserve 39mm | Q1378420Stainless steel case with a black alligator leather strap. Fixed stainless steel bezel. Silver dial with silver tone hands and stick hour markers. Minute markers around the outer rim. Date sub dial. Small seconds sub dial at the 6 o'clock position. Automatic movement with 43 hour power reserve. Scratch resistant sapphire crystal. Skeleton case back. Case diameter : 39 mm. Case thickness : 10 mm. Deployment clasp with push button. Water resistant at 30