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IWC Ingenieur, Ref. 666A, 1963

CHF 3,000


Mint and rare 36.5mm stainless steel IWC Ingenieur Ref. 666A (no-date version) aka 56662, case SN:1872460, movement SN:1724782  powered by automatic cal. 853, anti-magnetic wristwatch directly from 1963. Original silver dial in very good condition for its age, only showing very minor spotting, has taken on a lovely champagne colour patina over time. The lume in both hands and dial are still present, but obviously not glowing anymore (only around a second after UV light exposure). The watch is in practically NOS condition with extremely sharp case edges, never polished, comes on original IWC leather strap.

Case: Three-body, polished and brushed, antimagnetic cap to protect the movement against magnetic fields, screwed-down caseback, flat inclined bezel, concave lugs. Dial: Brushed silver with applied steel faceted baton indexes and luminous dots, outer minute divisions. Luminous steel dauphine hands. Movement: Cal. 853, 10 1/2“`, rhodium plated, 21 jewels, straight-line lever escapement, monometallic balance, shock absorber, self-compensating blued steel Breguet balance spring, micrometer regulator, Pellaton system winding. Dial, case, and movement signed. Dim. 36.5 mm. 

In 1955 the engineers at IWC were determined to build not only a highly precise watch but also one that is ideally protected. Created for scientists, engineers, doctors and, on a larger scale, people working in magnetic environments, the movement of the Ingenieur displays extreme robustness, as does its case, which reliably shields its heart from magnetic fields, shocks and water. The movement is protected by a soft iron cage against magnetic fields up to 80,000 amperes per meter (A/m) or 1000 gauss, same as Rolex Milgauss.

Watch is in overall great condition 9/10, running and ready to wear or gift!


Brand IWC / International Watch Company
Model Ingenieur 
Reference Ref. 666A / 56662
Year 1963
Movement Automatic
Calibre Cal. 853
Case material Stainless steel
Case size 36.5 mm
Bracelet original IWC slightly used black leather strap
Features Anti-magnetic up to 80,000 A/m or 1000 gauss, NOS/Mint, Patina 
Box/Papers No box, no papers


In fully working order. Great, almost perfect condition 9/10, minor surface scratches and discoloration through the age. Crisp sharp case edges, never polished. Champagne colour patina on the dial and markers. Original IWC slightly used black leather strap with steel buckle. No box, no papers.


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