For the Longines Flagship L4.374.4.57.6, the 30.00mm case accommodates a black dial, powered by the self-winding caliber L592.5.
Movement Type
Automatic
Caliber
L592.5Jewels
22
Reserve
40
Frequency
28800
Hands
Center Seconds
Shape
Round
Lug Distance
15.00 mm
Material
Stainless Steel
Glass
Sapphire
Thickness
8.10 mm
Diameter
30.00 mm
Water Resistance
30.00 m
Dial Color
Black
Material
Bracelet