Collection
Hercules
Watch name
Hercules Chrono New
Dial
black
Reference
2557-new-s1
Case
Material
stainless steel (316L)
Glass
sapphire
Surface
mixed
Water resist
10 ATM
Glass back
no
Size
47 mm
Crown
not screwed
Band
silicon
Strap width
22 mm
Movement
Manufacturer
Valjoux, Les Bioux, Switzerland (since 1901) now Member of ETA SA
Caliber
Valjou 7750
Date
yes
Weekday
yes
System
automatic
Energy
mechanical
Jewels
25
Vibrations
28´800 A/h