IWC Porsche design gents wristwatch with chronograph

IWC Porsche design gents wristwatch with chronograph reference 3702, self winding, frosted titanium case including bracelet with deployant clasp, 30 minutes- & 12 hour- register, day & date, tachometer graduation on the inside of the sapphire glass, base calibre Valjoux 7750, diameter approx. 41 mm, length approx. 19 cm, warranty papers & user's manual enclosed, sold in February 1992, condition 2, from the estate of a collector