IWC INGENIEUR REF 3508 500.000 A/M STEEL
International Watch Co., Schaffhausen, "Ingenieur Automatic
500.000 A/m, case No. 2450279, Ref. 3508. Made circa 1990s.
Fine and very rare, tonneau-shaped, center-seconds, self-
winding, water-resistant, antimagnetic, stainless steel
wristwatch with date and an integrated stainless steel IWC link
bracelet. Accompanied by a fitted box.
Three-body, polished and brushed, screw-down case back
and crown, "500.000 A/m" stamped on the side of the case, soft
iron cover to protect against magnetic fields, sapphire crystal.
Black with applied yellow gold dart indexes, aperture for the
date. Luminous yellow gold "baton" hands.
Cal. 37590, rhodium-plated, 21 jewels, straight-line lever
escapement, monometallic balance, shock absorber, self-compensating
flat balance spring.