The Longines Master Collection 40mm Power Reserve has a 40mm case holding the L602 automatic movement, which includes a power reserve indicator and date. It comes in multiple configurations.
Movement Type
Automatic
Caliber
L602Jewels
21
Reserve
42
Frequency
28800
Hands
Center Seconds
Shape
Round
Lug Distance
21.00 mm
Material
Stainless Steel
Glass
Sapphire
Thickness
10.80 mm
Diameter
40.00 mm
Water Resistance
30.00 m
Dial Color
Black
Material
Alligator