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Seiko NH35

Probable

Alongside the Miyota 9015, one of the two default automatics of the independent watch industry, fitted to an enormous number of unrelated watches. Its presence confirms that a watch matches its catalogued specification and can never identify the watch.

Specifications

Movement manufacturer
Seiko
Frequency
21,600 vph (3 Hz)
Jewels
24
Power reserve
41 hours
Winding
automatic
Complications
Centre seconds · Date · Hacking seconds

Architecture

Japanese automatic with centre seconds, a date, hacking and hand-winding, supplied by Seiko Instruments to outside brands. Related to Seiko's own 4R35.

Service practice

Inexpensive and abundant, so replacement rather than overhaul is normal practice at this price point.

References using this caliber

Provenance of this record

Sources & Evidence

Primary sourceManufacturer documentation

Jacques Bianchi — manufacturer specifications and brand history

Jacques Bianchi, Marseille

Accessed
2026-08-18

Cited for

This referenceProbable
Secondary sourceCollector research

Ranfft Watch Movement Archive

Dr. Roland Ranfft (archived and maintained by volunteers)

Accessed
2026-08-18

Cited for

This referenceProbable
View source ↗

Last verified: Not yet reviewed