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Differs

IWC Schaffhausen Ingenieur Automatic 42IW338903

Shape: Round; Round; Round
Diameter (differs): 42 mm; 42 mm; 42.5 mm
Thickness (differs): 11.5 mm; 14.1 mm; Not known
Lug width (differs): 14 mm; 22 mm; Not known
Material (differs): Ceramic; Rolesor (steel and gold); Ceramic
Bezel: Not known; Bidirectional rotating; Not known
Caseback (differs): Display (sapphire); Screw-down; Display (sapphire)
Crystal (differs): Sapphire, Domed, Anti-reflective on both sides; Sapphire; Sapphire
Cyclops: Not known; Yes; Not known
Crown: Not known; Screw-down; Not known
Water resistance: 100 m; 100 m; 100 m

Calibre (differs): IWC 82110; Rolex 9002; Zenith El Primero 3652
Type: Automatic; Automatic; Automatic
Origin: Not known; In-house; Not known
Power reserve (differs): 60 h; 80 h; 60 h
Frequency (differs): 28,800 vph (4 Hz); 28,800 vph (4 Hz); 36,000 vph (5 Hz)
Jewels (differs): 22; 40; 35
Certification: Not known; Superlative Chronometer; Not known
Functions (differs): Central hacking seconds
Date display; Centre hour, minute and seconds hands
24-hour display on off-centre disc
Second time zone
Instantaneous annual calendar at 3 o'clock and rapid-setting of the date
Month display via 12 apertures around the circumference of the dial
Stop-seconds for precise time setting; Big date
Chronograph
Column wheel
Flyback
Hours
Minutes
Small seconds
Complications (differs): Central seconds
Date
Hacking (stop) seconds; Annual calendar
Central seconds
Date
GMT / second time zone
Hacking (stop) seconds
Month; Big date
Chronograph
Flyback chronograph
Small seconds

The watches side by side