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Seiko 7009A

 

Seiko 7009ASeiko 7009A

Description

This movement is one of the most produced japanese movements, which was for example and mainly used in the legendary "Seiko 5", until it was replaced in the late eighties by its successor, the caliber 7S26.

The 17-jewel equippted movement is pretty simple but efficiently constructed. It cannot be handwound, but on the other hand, it uses a rather elaborated excenter mechanism like for example IWC uses in many of their own movement. The 7009A uses all possible indications, hour, minute, second and day and weekday.

An interesting detail is, that the day is advanced by turing the crown in its second position, but the weekday is advanced by pressing the crown in position one.

 

 

 Technical data

ManufacturerSeiko
Caliber7009A
Number of jewels17
EscapementAnchor with pallets
BalanceGlucydur
Shock protection(s)Diashock (Seiko)
Balance cock directioncounterclockwise
Hairspring studmoveable
Regulator typeHairspring key
Winding mechanismyoke
FeaturesSC?,QG,JG,RDR,AUT
FunctionsHour, minute, second, day, weekday, selfwinding
Beats per hour21600
Image in Flume Werksucher 0
Seiko 7009ASeikoSeiko7009ASeiko 7009A17 Jewels, 21600 A/h, SC?,QG,JG,RDR,AUT
Factsheet