Zenith 400Z-705, Escape wheel, 20 teeth

• ZENITH original part in factoy sealed packaging. no: 53.76.0390.400
  

• Wheel with 20 teeth / Pinion with 8 teeth.
  

• Fits cal: 400Z, 405Z, 410Z, 420Z, 4001, 4002, 4009, 4021
  

Versions:

• 3019PHC: date.
• 3019PHF: H:= 7.55 mm, day, date, month, moon phase.
• 400*: H:= 6.50 mm, date, redesign.
• 405*: H:= 6.50 mm, fly back function.
• 410*: H:= 7.55 mm, day, date, month, moon phase.
• 420*: H:= 5.70 mm, manual wind.
• 4001: H:= 7.77 mm, day, date, month, moon phase.
• 4002: H:= 6.50 mm, date.
• 4009: H:= 7.55 mm, day, date, month, moon phase, fly back.
• 4021: H:= 6.50 mm, 60 s, 30 min counter, sceletonized at escapement, power reserve display.
• 4026: H:= 9.35 mm, rattrapante, big date.
• 4052: H: = -- mm, 1/10 th of a second chronograph

• * = suffix Z: redesigned fourth wheel and escape wheel.