Automatic Chronograph movement, Manufacture Concepto base, exclusively modified for Edouard Koehn28’800 vibrations per hour 4hz, 31 jewels, 48 hours power reserve, 282 parts. Top chronometer quality regulating organ - balance springFunctions : Hours, minutes, small seconds sub-dial at 6 o’clockChronograph : 60 seconds Chronograph by central hand (red hand), central Split-Seconds chronograph (blue hand), instantaneous 60-minute chronograph register at 12 o’clock316L Stainless steel case, with coaxial crown-pusher to activate the split- seconds chronographDiameter : 40.0 mmHeight : 13.10mm without glass box sapphire crystal 14,60mm with sapphire crystal50 meters water-resistantDouble sided antireflective glass box sapphire crystalDial: Grand feu white enamel - inspiration from the original pocket watch dialSapphire crystal case-back.50 pieces limited edition in steel, individually numbered on the case backBeige Louisiana alligator leather strap with light blue alligator leather lining. Dimensions 20mm x 18mmSteel folding buckle – pin buckle optional