CALENDA CHARCOALNamed after the Latin word Calendarium (calendar), this timepiece displays the weekday and month sub dials in perfect balance with its big date window. A galvanized brushed dial reveals the most subtle changes in ambient light. CASE DIAMETER 42 mm CASE HEIGHT 15 mm LUG WIDTH 22 mm WATER RESISTANCE 5 ATM FUNCTIONS Hour, Minutes, Seconds, Month, Week Day, Big Date. MOVEMENT Automatic Caliber ST2527 25 Jewels 21,600 vpH Regulated to Accuracy of + 10 secs