The 666 marked IWC's debut of the Ingenieur line, incorporating a Faraday cage and soft iron dial to resist magnetic fields up to 80,000 A/m. Reference 666AD features a black dial, a stainless steel case, and runs on the caliber 8521 movement.
Movement Type
Automatic
Caliber
IWC 8521Jewels
21
Reserve
42
Frequency
19800
Hands
Center Seconds
Shape
Round
Material
Stainless Steel
Glass
Plexi
Thickness
13.20 mm
Diameter
36.50 mm
Water Resistance
100.00 m
Dial Color
Black
