The Aquatimer Perpetual Calendar Digital Date-Month features an imposing 49-millimetre Ceratanium® case and case back ring, a black dial and black hands with blue luminescence, and a black rubber strap with a Ceratanium® pin buckle.

Overview
Reference: IW379406
Dial Color: Black
Case: Ceratanium®
Strap: Black rubber strap with IWC-patented quick-change system
Diameter: 49 mm
Movement: Automatic, self-winding, IWC-manufactured movement

Features
Small hacking seconds
Sapphire glass, convex, antireflective coating on both sides
IWC bracelet quick-change system
Mechanical external/internal rotating bezel with SafeDive system
Chronograph function with hours, minutes and seconds
Flyback function
Hour and minute counters combined in a totalizer at 12 o’clock
Perpetual calendar with large double-digit displays for date and month and leap year display

Case
Strap width: 22 mm
Buckle width: 22 mm
Case: Ceratanium®
Diameter: 49 mm
Height: 19.4 mm
Water Resistance: 10 Bar
Crown: Screwed-in
Back case: With synthetic sapphire crystal

Movement
Movement type: Automatic, self-winding
IWC-manufactured movement: Yes
Power Reserve: 68 hours
Frequency: 28800 Vph (4 Hz)
Components: 474
Jewels: 51
Calibre: 89802