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Movement · Seiko · automatic

Seiko 4R57 movement

Seiko 4R57 is an automatic movement by Seiko: 291 jewels, beating at 21,600 bph1, 41 h1 of power reserve. 3 watches in our base use it: SSA343, SSA345 (list).

Sources checked · How we source numbers

4R57 at a glance

Jewels
291
Beat rate
21,600 bph1
Power reserve
41 h1
Do not set the date
21:00–01:301

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

Setting and servicing the 4R57

The figures a watchmaker or a timegrapher needs for the 4R57, as Seiko prints them.

Power reserve
41 h1
Do not set the date
21:00–01:301
Hacking seconds
Yes1
Hand winding
Yes1

Watches with the 4R57

All 4R57 figures

Every figure we hold for the 4R57, with its source. Where sources disagree, each value is shown.

Running

Jewels
291
Beat rate
21,600 bph1
Power reserve
41 h1
Hands and functions
hours, minutes, centre seconds, date, power_reserve_indicator1
Hacking seconds
Yes1
Hand winding
Yes1

Accuracy and care

Do not set the date
21:00–01:301

Not published yet

  • Diameter: not published by Seiko
  • Height: not published by Seiko
  • Accuracy (maker): not published by Seiko
  • Lift angle: not published by Seiko
  • Hand holes: not published by Seiko
  • Dial feet: not published by Seiko
  • Stem part number: not published by Seiko

4R57 questions

How long does the 4R57 run when fully wound?

About 41 h from a full wind, per Seiko.

Source [1]

When should you not change the date on the 4R57?

Not between 21:00 and 01:30, per Seiko: the 4R57’s date change is engaged then, so move its hands past 01:30 before using the quick-set.

Source [1]

Does the 4R57 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]

Which watches use the 4R57?

3 watches in our base name the 4R57: SSA343, SSA345, SSA347.

More on movements

Sources

Documents checked · Report a wrong number

  1. 1Seiko Watch Corporation — Instructions: SEIKO Automatic Watch Cal. 4R57 (English/multilingual booklet) · pdf · read
  2. 2Seiko Watch Corporation — SSA343J1 product page (Presage), seikowatches.com global-en · html · read
  3. 3Right Time International — SSA345 listing, Right Time (Denver), dealer spec block (pre-owned listing, sold out 6/2025) · html · read
  4. 4Seiko Watch Corporation — SSA347 product page (Presage), seikowatches.com global-en · html · read