INTERNATIONAL WATCH COMPANY, SCHAFFHAUSEN, "DER DOPPELCHRONOGRAPH AUTOMATIC", CASE NO. 2728532, REF. 3713 MADE CIRCA 1995
stainless steel, self-winding, water-resistant wristwatch with round-button split-seconds chronograph, registers, day and date calendar and and IWC stainless steel buckle; two-body case, brushed, stepped inclined bezel, screw-down crown and back, concave lugs, button at 10 for the split-seconds, sapphire crystal, black with white Arabic numerals and luminous quarter-hour indexes, outer fifths of a second divisions, apertures for the day and date, subsidiary dials for the seconds, 30-minute and 12-hour registers; luminous steel hands; movement caliber 79230, 29 jewels, straight-line lever escapement, monometallic balance, self-compensating flat balance spring, shock absorber; dial, movement and case signed
42mm diameter