Longines Master Collection Moon Phase Chronograph Small Seconds Watch - 42 mm Steel Case - Silver Barleycorn Arabic Dial - Brown Alligator Strap - L2.773.4.78.342. 00 mm stainless steel case, transparent sapphire crystal back, scratch resistant sapphire crystal, silver barleycorn dial with painted Arabic numerals, caliber L687 automatic movement with chronograph, hours, minutes, small seconds with 24 hours indicator at 9 o'clock, date indicated by the half moon central hand, moon phase display at 6 o'clock., approximately 54 hours of power reserve, brown alligator strap. Water resistant to 3 bar.