Case Material: Stainless steel case back: Screw back, exibiton see-through case back Mechanical Movement: Automatic, 20 jewels, day, date, month, year, & 24 hour sub dials. Dial: Black enamel dial with silver Arabic numerals, (red to indicate year) month located at 12 o'clock, day & date located at 3 o'clock. 24 hour located at 6 o'clock, and year indicator located at 9 o'clock (up to year 2015) features chrono style quick adjustment. Crystal: Hardened mineral crystal Water resistance: 3ATM