Longines Classic/Watchmaking Tradition Collection Swiss Automatic Chronograph Watch With A Brown Leather Strap, 40mm Stainless Steel Case & Silver "Barleycorn" Dial With Date Window. Long experience meets vast expertise A traditional watchmaker, Longines has produced exceptional timepieces since its inception. The Longines Master Collection is the perfect contemporary illustration of this, as demonstrated by the success met by this collection since its launch in 2005. All driven by automatic calibres, the various variations of this collection offer numerous sophistications. The Longines Master Collection combines classic elegance and excellence to the delight of watch lovers. Case Back: Transparent case back with sapphire crystal Lug Distance: 21 mm Weight: 83.7 g Hands: Blued steel hands Caliber: L881 Chronograph Function: Chronograph mechanism: central 60 seconds hand and 30 minutes counter at 9 o'clock Movement: Self-winding mechanical movement beating at 28'800 vibrations per hour, with a power reserve of approximately 59 hours Function:Hours, minutes, small seconds at 3 o'clock and date Buckle: With triple safety folding clasp and push-piece opening mechanism Magnetic Resistance: No