1960s IWC "Ingenieur" Ref. 666AD Cal.8531 Tropical Gray Dial

Manufacturer International
Model Ingenieur
Year of Manufacture 1960s
Reference no. 666AD
Product no. A-5652
A 1960 International Masterpiece "Ingenieur" model, Ref.666AD in stainless steel, equipped with the in-house caliber Cal.8531 Tropical grey dial. This is the first series of In Junior watches with a unique look of a calendar display laid out in the center of the dial and a Bombay dial, which is unique to the caliber 8531. The silver dial, which has changed to gray color evenly over the whole surface, shows a wonderful vintage taste, and although there are some minor scratches, the anti-magnetic screw back water-resistant case that retains the massive feeling that is characteristic of Injunior is a gem in excellent preservation condition.
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Item details

Serial no. 1,397,***
Caliber 8531
Movement no. 1,529,***
Movement type Automatic
Material Stainless steel
Case size 36mm
Case type Snap-back, waterproof
Dial Original
Type of Indices Luminous & Applied
Belt Non-original (lug width: 18mm)
Evaluation case 92%
Evaluation dial 92%
Evaluation mov 93%
Condition 4.5
Rarity 4.5

Other details

Case: some minor scratches, but the case is in clean condition with plenty of original shape and volume. Dial: slight ageing, no visible scratches or blemishes. Movement: no problem to wind up the watch. Accuracy is about 20 seconds per day.