Ladies automatic movement with date complication, 19,800 BPH. Used in Oyster Perpetual Date ladies models (refs 6513-6702) from mid-1950s until 1967.
Movement Type
Automatic
Jewel Count
26 jewels
Frequency
19,800 vph (5.5 Hz)
Diameter
20mm
Height
5.9mm
Rotor Type
central_rotor
Winding
automatic_bidirectional
