IWC chronograph in Porsche design, self winding, Switzerland around 1997, reference 3704, titanium case including bracelet with deployant clasp, screwed-down case back & winding crown, sapphire crystal, display of hours, minutes, constant second, day, date & chronograph, calibre 790, central rotor, incablock shock-absorber, diameter approx. 42 mm, length approx. 21 cm, signs of use due to age, condition 2-3, property of a collector