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Movement · Seiko · Spring Drive

Seiko 9R65 movement

Seiko 9R65 is a Spring Drive movement by Seiko: 301 jewels, 72 h1 of power reserve.

Sources checked · How we source numbers

9R65 at a glance

Jewels
301
Power reserve
72 h1
Accuracy
±15 s/month1
Do not set the date
21:00–01:002

New to the terms? Read quartz vs automatic or watch movement types.

Setting and servicing the 9R65

The figures a watchmaker or a timegrapher needs for the 9R65, as Seiko prints them.

Accuracy (maker)
±15 s/month1manual: average estimated when worn between 5 C and 35 C
Power reserve
72 h1
Do not set the date
21:00–01:002
Hacking seconds
Yes1
Hand winding
Yes2

All 9R65 figures

Every figure we hold for the 9R65, with its source. Where sources disagree, each value is shown.

Running

Jewels
301
Power reserve
72 h1
Hands and functions
hours, minutes, centre seconds, date2
Hacking seconds
Yes1
Hand winding
Yes2

Accuracy and care

Accuracy (maker)
±15 s/month1
Do not set the date
21:00–01:002

Origin

Made from
20043secondary source

Not published yet

  • Diameter: not in the documents we read
  • Height: not in the documents we read
  • Beat rate: not published by Seiko
  • Lift angle: not published by Seiko
  • Hand holes: only in Seiko’s drawing; not read yet
  • Dial feet: only in Seiko’s drawing; not read yet
  • Stem part number: not published by Seiko

9R65 questions

How accurate is the 9R65?

Seiko rates the 9R65 at ±15 s/month, measured under Seiko’s own test conditions; a worn 9R65 can run outside the ±15 s/month range.

Source [1]

How long does the 9R65 run when fully wound?

About 72 h from a full wind, per Seiko.

Source [1][2]

When should you not change the date on the 9R65?

Not between 21:00 and 01:00, per Seiko: the 9R65’s date change is engaged then, so move its hands past 01:00 before using the quick-set.

Source [2]

Does the 9R65 hack and hand-wind?

Yes, it hacks: the seconds hand stops with the crown pulled out. It can be wound by the crown.

Source [1][2]

More on movements

Sources

Documents checked · Report a wrong number

  1. 1Grand Seiko (Seiko Watch Corporation) — Caliber 9R65 product page (specifications) · html · read
  2. 2Grand Seiko (Seiko Watch Corporation) — Operating instructions, Grand Seiko 9R calibres incl. 9R65 (EN) · pdf · read
  3. 3Watch Wiki — Seiko 9R65 (watch-wiki.net) · html · read