The Cal. 6S37 is an automatic column wheel chronograph from Seiko with power reserve indicator.
The movement is a member of the well-known calibre family 6S (→ Seiko 6S78). It is considered a top class movement and even superior to the Valjoux 7750.
Used in the Seiko Flightmaster Chronograph model, among others. An extended conversion of this caliber is used in the Erhard Junghans Aerious model (Junghans J 890).
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