Family: NH
The NH71A is an automatic movement manufactured by Seiko Instruments Inc. and belongs to the NH in-house caliber family. As an open-heart variant, it features a visible escapement wheel visible through an aperture in the dial, exposing the mechanical activity at the balance wheel. The movement is in production and used in Seiko's contemporary automatic watches. Also referred to as NH71.
Last updated 29 Apr 2026Suggest a correction
TECHNICAL SPECIFICATIONS
Movement Type
Automatic
Display Type
Analog
QUICK FACTS
TYPE
AutomaticSTATUS
In ProductionMANUFACTURE
In-houseCALIBER FAMILY
NHALSO KNOWN AS
nh71
FOR WATCH DEALERS
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