The Longines Master Collection L2.840.4.78.3 has a 47.5mm stainless steel case housing the manually wound L507 movement.
Movement Type
Manual
Caliber
L507.2Jewels
17
Reserve
46
Frequency
21600
Hands
Small Seconds
Shape
Round
Lug Distance
25.00 mm
Material
Stainless Steel
Glass
Sapphire
Diameter
47.50 mm
Water Resistance
30.00 m
Dial Color
Silver
Material
Alligator
