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Differs

Longines Spirit FlybackL3.821.4.93

Longines Spirit Zulu TimeL3.812.4.50

Shape: Round; Not known; Round
Diameter: 42 mm; 42 mm; 42 mm
Thickness (differs): 17 mm; 15.25 mm; 14.1 mm
Lug to lug (differs): 49.5 mm; Not known; 49.4 mm
Lug width (differs): 22 mm; 20 mm; 22 mm
Material: Stainless steel; Stainless steel; Stainless steel
Bezel: Bidirectional rotating; Bidirectional rotating; Bidirectional rotating
Caseback (differs): Display (sapphire); Screw-down; Solid
Crystal (differs): Sapphire, Anti-reflective on both sides; Sapphire, Domed, Anti-reflective on both sides; Sapphire, Anti-reflective on both sides
Crown (differs): Screw-down; Push-pull; Screw-down
Water resistance: 100 m; 100 m; 100 m
Weight (differs): 127.4 g; Not known; 164 g

Calibre (differs): Longines L791.4; Breitling Gallet 23; Longines L844.4
Type: Automatic; Automatic; Automatic
Power reserve (differs): 68 h; 65 h; 72 h
Frequency (differs): 28,800 vph (4 Hz); 28,800 vph (4 Hz); 25,200 vph (3.5 Hz)
Jewels (differs): 28; Not known; 21
Certification: COSC; Not known; COSC
Functions (differs): Hours, minutes, small seconds at 9 o'clock
Chronograph mechanism: central 60 seconds hand and 30 minutes counter at 3 o'clock; Not known; Hours, minutes, seconds and date. 24 hours hand with time zone mechanism
Complications (differs): Chronograph
Flyback chronograph
Small seconds; Chronograph; Date
GMT / second time zone

The watches side by side