Porsche Design by IWC The Compass Watch, Automatic, Ref. 3551. Made in the early 1990's. Fine and very unusual, anti-magnetic, center seconds, self-winding, water-resistant, black, PVD-coated aluminum wristwatch with double case containing a compass and mirror to determine positions, date, moon phases and a black link bracelet with deployant clasp.
The IWC Ingenieur was introduced in 1955, featuring the calibers 852 (time only) and 8521 (date), a new winding system developed by Albert Pellaton. It was an anti-magnetic wristwatch with a soft iron inner-case and dial.
The first generation of ref. 666A Ingenieurs was produced in a variety of dial styles and in both stainless steel and 18k gold, and are sought after by collectors.
The present example features unusual and much rarer 18kt gold case, giving the watch a more "dressy" feel.