Contemporary variation of the original big obervation watch form the thirties with mechanical stoppwatch movement.
crown at left
Reference
9557SOS-Left-a3
Case Diameter
55 mm
Dial color
grey
Movement (Type)
automatic
Movement (Caliber)
Valjoux 7750
Case Material
stainless steel
Case Surface
matt
Water Resistance
3 ATM
Glass
mineral crystal
Case Back
glass back
Band
leather strap
Origin
Swiss Made