Miyota Caliber 0S21 Quartz Watch Movement

Miyota Caliber 0S21

Miyota Caliber 0S21 Quartz Watch Movement

ManufacturerMiyota (Citizen)
Caliber Number0S21 aka OS21
TypeQuartz
Replaces CaliberCitizen 0510
Diameter13.50”’ (30.80mm)
Height
5.10mm
Battery Cell NumberSR927W
Frequency32,768Hz
Quartz TypeTuning fork type quartz crystal
Stem065-453
Hand Sizes120/80/18
Jewels0
FunctionsHours, minutes, central chronograph seconds, 60 minute counter, 24 hour hand, date
Country of ManufactureJapan
Known Models
REC, Philip Stein Active Chronograph

The Miyota caliber OS21 is a quartz watch movement with zero jewels. It is made in Japan.

Accuracy Rating

Miyota states the accuracy of this movement to be +/-20 seconds/month.

Additional Resources:

Watches with the Miyota 0S21


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ewr
ewr
5 years ago

Why did you white the battery?

Dicey
Dicey
2 months ago
Reply to  Caliber Corner

So how would you replace the battery with that plastic cover on it like that?

Todd
Todd
16 days ago
Reply to  Dicey

The plastic cover pops off. It’s part of the movement retainer to hold it in the case, but has an arm attached to it that also covers the battery. The whole plastic surround just pops right off, and then you can get the battery out.

Marius
Marius
4 years ago

Is there any chance I can order this mechanism?

Archie Burton
Archie Burton
4 years ago

Hi I am looking for a set of hands for a Miyota OS21 movement, they would not seem to be standard hands and sit down through the dial. Can you help? I have a picture of the actual hands

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News: Dugena Dakota Chronograph - Retro-Design zum moderaten Preis - zeigr.com
3 years ago

[…] bekannten Uhrenmarken – nicht nur bei Citizen. In der Dugena Dakota arbeitet übrigens ein Miyota OS21. Alles in allem kann man also sagen, dass man hier vernünftige Qualität zu einem vernünftigen […]

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Retro-Uhren unter 200 Euro: Dugena Dakota & Kemora - zeigr.com
3 years ago

[…] lag immer leicht neben der Minuten-/Sekunden-Markierung. Und was wahrscheinlich mit dem Werk (Miyota OS21) zusammenhängt: Beim Starten der Stoppuhr „klickt“ der Drücker, beim Stoppen […]

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Are Miyota (Citizen) OS20 Movements Swappable with Seiko VK63 Mecaquartz?
3 years ago

[…] interesting, I was going by Caliber, which apparently incorrectly shows they are the same size?Miyota Caliber 0S21 Watch Movement | CaliberCorner.comHattori SII Caliber VK63 Watch Movement | CaliberCorner.com So it seems they are not both 0.80mm […]

Christopher Darway
Christopher Darway
2 years ago

Looking for 0S10 caliber for Boccia Do you still have these in stock?

Lokman
Lokman
1 year ago

Is the OS21 Chrono movement considered as mecha quartz? I.e with sweeping chrono hand movement

Evil
Evil
1 year ago

I just bought an obvious fake hubot big bang with the miyota 0s21.
One day old and working very nicely

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New Watch Alert: 8/28/2020 - The Truth About Watches
1 year ago

[…] you can guess from the price, it holsters a quartz movement: the Miyota 0S21. The accuracy’s more-than-merely-adequate  (+/-20 seconds per month) there’s lume in […]

Mirko
Mirko
1 year ago

Che tipo di batteria va montata?

Craig Johnson
Craig Johnson
9 months ago

Used by TRIWA NEVIL

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Dicey
Dicey
2 months ago
Reply to  Craig Johnson

how did you get the white plastic bit off of this? I have a NEVIL too but mine has a white plastic cover

Watchelper
Watchelper
2 months ago
Reply to  Dicey

The picture you show doesn’t have a white plastic cover…

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⌚️ Los relojes Briston puestos a prueba - Reloj.Watch ⌚ - 1 /julio /2021
3 months ago

[…] fuente de alimentación de este reloj es Movimiento de cuarzo Miyota OS21. Miyota son propiedad de Citizen, son uno de los mayor fabricante de movimientos de relojes en el […]

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