The ref. 401.031 1815 Chronograph, available from 2004 to 2008, sports a 39.5mm pink gold case paired with a black dial and silver-toned subdials.
Movement Type
Manual Chronograph
Caliber
L951.0Jewels
34
Reserve
36
Frequency
18000
Hands
Small Seconds
Lug Distance
20.00 mm
Material
Pink Gold
Glass
Sapphire
Thickness
10.80 mm
Diameter
39.50 mm
Dial Color
Black