Vulcain is reviving it 1970s Chronographs The new Chronograph 1970's with its 38mm diameter and 12.40 mm thick "step-case" is identical to the original and set to appeal to vintage chronograph lovers. It is available in 4 dial colors: blue, black, panda-silver and salmon (limited to 50 pieces). At its heart is a hand-wound SW510 M BH movement with a 63-hour power reserve – a feature appreciated by collectors and daily wearers alike. CASE : 316L Steel Polished SilverCASE-BACK : 316L Steel Polished Silver Stainless Steel Caseback DIAL : Semi Gloss Sunray Blue w/ white printing/polished silver indexesDIAMETER : 38.00 mmTHICKNESS : 12.40 mmGLASS : Double Domed Sapphire Glass with Anti-Reflective CoatingWATER RESISTANCE : 5 ATMSTRAP : Brown leather strap w/ matched stitching (Calf Harrison)DIMENSIONS : 20x16 mmBUCKLE : 316L with engraved Vulcain logoCALIBRE : Round Calibre13 ¼ ’’’ Ligne Mechanical movement Manual winding time setting MOVEMENT : SW510 M BH b-Manual, no calendar, Vulcain logoFUNCTIONS : Analog Display by means of 5 Hands - Hour/Minute/Second/3H & 9H small HandsFREQUENCY : 28800 vibrations per hour, 4HzPOWER RESERVE : 63 hours