Seiko 4206B

Seiko 4206B | - The Movement Archive

Seiko 4206B


The last Seiko ladies' selfwinding movement is the caliber 4206(B). It measures a little less than 8 lignes in diameter, has got a ball beared quarter-arc rotor and can be handwound.

The enormous amount of functions is astonishing: It does not only display the hours, minutes and seconds, but also the date and bilingual weekday. Both can be quickset in the middle crown position.

The Seiko 4206B has got seventeen jewels, an excenter winding mechanism and a Glucydur balance, which is secured in two inhouse Diashock absorbers.

Seiko 4206B: Seiko 4206B dial side

Seiko 4206B dial side

Technical data

Size:7 3/4'''
lift angle:49°
Number of jewels:17
Escapement:Pallet lever
Balance types: Glucydur anular balance
Shock protection(s): Diashock (Seiko)
Balance bearing / direction hairspring:Clockwise
Moveable stud:yes
Adjust mechanism:Hairspring key
  • SC? (center seconds (type unknown))
  • QG (date indication (aperture))
  • JG (weekday indication (aperture))
  • RDR (date corrector)
  • AUT (selfwinding)

Usage gallery

Seiko 4206B: Seiko Automatic ladies' watch model 0420

Seiko Automatic ladies' watch model 0420