Ball Watch's in-house manufacture caliber representing their return to railroad-grade accuracy. Features a silicon balance spring for inherent magnetic resistance and a nickel-based escape wheel and lever achieving up to 2,500 Gauss magnetic resistance. Exceeds COSC standards by 30% with accuracy of -2/+5 seconds per day, reviving Ball's historic railroad standard. Equipped with Ball's patented Amortiser anti-shock system.
Movement Type
Automatic
Jewel Count
25 jewels
Power Reserve
70h
Frequency
28,800 vph (8 Hz)
Display Type
Analog
Rotor Type
bidirectional
Shock Protection
Amortiser
BRAND
BALL Watch CompanyTYPE
AutomaticSTATUS
In ProductionMANUFACTURE
In-houseCALIBER FAMILY
RRM73xxCOUNTRY
SwitzerlandALSO KNOWN AS
