This is an exceptional and rare example of an 18k IWC Ingenieur reference 666A from the 1960s. The 18k yellow gold case is extremely sharp and looks to be unpolished. The original black dial is in mint condition and has the rainbow effect of an original black dial from the time period. This particular watch is automatic with a date feature and is powered by IWC's caliber 8531. It is very difficult to find these models with black original dials and in such mint condition.
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