IWC INGENIEUR REF 3506 STEEL
International Watch Co., Schaffhausen, "Ingenieur Automatic'',
case No. 2388290, Ref. 3506. Made circa 1988.
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.
Three-body, polished and brushed, screw-down case back
and crown, soft iron cover to protect against magnetic fields,
sapphire crystal.
Gray with applied yellow gold dart indexes, aperture for the
date. Luminous yellow gold "baton" hands.
Cal. 3753, rhodium-plated, 22 jewels, straight-line lever
escapement, monometallic balance, shock absorber, self-compensating
flat balance spring.