IWC Ingenieur Ref. 666A, water-resistant, center seconds, antimagnetic, self-winding with "Pellaton" system, in 18kt yellow gold.
Case: Three-body, polished and brushed, antimagnetic cap to protect the movement against magnetic fields, screwed-down caseback, flat inclined bezel, concave lugs. 18kt yellow gold case. Case back has a large engraving.
Dial: Brushed silver with applied gold faceted baton indexes and luminous dots, outer minute divisions. Luminous steel dauphine hands.
Movement: Cal. 853, 10 ½''', rhodium plated, oeil-de perdrix decoration, 21 jewels, straight-line lever escapement, monometallic balance, shock absorber, self compensating blued steel Breguet balance spring, micrometer regulator, Pellaton system winding.
Diameter: 37mm Thickness: 12mm
original signed Buckle
In 1955, IWC introduced the Ingenieur model, an anti-magnetic wristwatch that featured a soft iron inner-case and dial. The Ingenieur featured a new winding system that did not have a rotor, designed by (and named for) Albert Pellaton – the Caliber 852. It allowed watchmakers to disconnect the winding system and watch barrel to do certain repairs on the main spring and escapement. Previously, the entire winding system had to be removed to make those repairs. This system also made the movement more shock proof, and is still in use on many IWC models today.
The first generation of Ingenieurs were designated the reference 666A – “A” for automatic, or 666AD – “AD” for automatic and date. These references features the calibers 852 (time only) and 8521 (date). These calibers were used through 1958, and replaced by the calibers 853 and 8531. Even though the Ingenieur was geared more towards engineers, it was available to civilians and produced with a variety of dial styles and in both stainless steel but also in 18 kt gold cases. These gold models are much rarer. The second generation of Ingenieurs was introduced in 1967.
Today, vintage Ingenieurs are sought after by collectors for being a “tool” watch with a classic design. The logo on the dial makes this model stand out, being a subtle way to indicate the watch’s anti-magnetic construction. The present Ingenieur features the more unusual 18 kt gold case, giving the watch a more “dressy” feel.