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Differs

Longines Spirit Zulu TimeL3.812.4.50

Longines Spirit Zulu TimeL3.812.4.53

Shape: Round; Round; Round
Diameter: 42 mm; 42 mm; 42 mm
Thickness: 14.1 mm; 14.1 mm; 14.1 mm
Lug to lug: 49.4 mm; Not known; 49.4 mm
Lug width: 22 mm; 22 mm; 22 mm
Material (differs): Stainless steel; Rolesor (steel and gold); Stainless steel
Bezel: Bidirectional rotating; Bidirectional rotating; Bidirectional rotating
Caseback (differs): Solid; Screw-down; Solid
Crystal (differs): Sapphire, Anti-reflective on both sides; Sapphire; Sapphire, Anti-reflective on both sides
Cyclops: Not known; Yes; Not known
Crown: Screw-down; Screw-down; Screw-down
Water resistance: 100 m; 100 m; 100 m
Weight (differs): 164 g; Not known; 112.9 g

Calibre (differs): Longines L844.4; Rolex 9002; Longines L844.4
Type: Automatic; Automatic; Automatic
Origin: Not known; In-house; Not known
Power reserve (differs): 72 h; 80 h; 72 h
Frequency (differs): 25,200 vph (3.5 Hz); 28,800 vph (4 Hz); 25,200 vph (3.5 Hz)
Jewels (differs): 21; 40; 21
Certification (differs): COSC; Superlative Chronometer; COSC
Functions (differs): Hours, minutes, seconds and date. 24 hours hand with time zone mechanism; 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; Hours, minutes, seconds and date. 24 hours hand with time zone mechanism
Complications (differs): Date
GMT / second time zone; Annual calendar
Central seconds
Date
GMT / second time zone
Hacking (stop) seconds
Month; Date
GMT / second time zone

Colour (differs): Black matte; Bright blue; Black matte
Material: Not known; Brass; Not known
Pattern (differs): Matte; Sunburst; Matte
Indices (differs): Applied, Arabic numerals; Baton; Applied, Arabic numerals
Hands: Baton; Baton; Baton
Lume (differs): Super-LumiNova; Chromalight; Super-LumiNova

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