Grande Complication 3770 Platinum / Black / German / Bracelet

Ref. IW9270-18

IWC introduced its first 'Grande Complication' wristwatch at the 1990 Basel watch fair. Building upon the platform that Kurt Klaus' perpetual calendar module had provided them, IWC went ahead and added a minute repeater to the already complex movement. The case measured 42.2mm across at a height of 16.3mm, making it of considerable size - especially at the time of introduction. Reference IW9270-18 is part of the second generation of Grande Complication's, being distinguished by the updated dial design and 'dauphine' hands.

Release year

1993

Case diameter

42.2 mm

Thickness

16.3 mm

Water resistance

10 m

Case material

Platinum

Crystal

Sapphire

Dial

Black

Movement

IWC caliber 79091

Movement type

Automatic

Display

Analog

Power reserve

44 h

Frequency

28800 vph

Jewels

75

Complications

Chronograph, Date, Day, Hours, Minute Repeater, Minutes, Month, Moonphase, Perpetual Calendar, Small Seconds, Year Indicator