Miyota Caliber 8n24

Miyota Caliber 8N24

Miyota Caliber 8n24

BrandMiyota (Citizen)
Caliber Number8N24
Movement TypeAutomatic
Minimum Case Diameter
Minimum Case Thickness
Vibrations Per Hour
21,600 bph
Lift Angle
49 degrees
Anti-Shock SystemParashock
Power Reserve
42 hours
Hand Windable?
Rotor Winding DirectionCounterclockwise
Dial Screws929-610
Case Clamps
Case Clamp Screws
Hand Sizes
1.50mm / 1.0mm / 0.17mm
FunctionsCentral hours, central minutes, central seconds
Country of ManufactureJapan
Known ModelsElectricianz Hybrid Mechanical Time Display, TACS ATLAquacy Hei Matau Skeleton, Aragon Silverjet (Add your watch in the comments below…)

The Miyota caliber 8N24 is is a manual wind skeletonized watch movement made in Japan. It has 21 jewels, beats at 21,600 bph and tells the time via a standard 3 hand display. It is a true no-date movement with only one crown position (time-setting) and no phantom crown position.

The text on a stock rotor of the 8N24 reads: Twenty-One 21 Jewels / Miyota Co. / 8N24 / Japan. You may see the manufacturer’s stock images with the letters CWMJ instead of the caliber number. This abbreviation stands for: Citizen Watch Manufacturing Co. Japan.

Color Choice:

The caliber 8N24 is available from Miyota in silver or a gold tone gilt color. The only difference between these two is the finish. Some brands may choose one over the other depending on the style and colors of the watch the movement will be powering.

Miyota Caliber 8n24 Gilt Comparision

8N24 Accuracy:

Miyota claims that the caliber 8N24 offers accuracy of -20 ~ +40 seconds per day. This is measured within 10-60 minutes from a full wind via the crown. To fully wind the movement, turn the crown 40 times.

Miyota 8N24 VS 8N40:

Miyota also offers a similar skeletonized auto caliber 8N40 with the main difference being that the 8N24 has a central seconds hand and the 8N40 has an offset small seconds subdial at 4:30 on the dial. Both movements use the same 8NXX base framework.

8N24 VS 8N33:

The 8N24 and 8N33 are both 3-hand skeletonized movements from Miyota, however the 8N33 is a manual wind movement and the 8N24 discussed here is an automatic. The 8N33 has 17 jewels whereas the 8N24 has 21. The height of the 8N24 is 1.08mm thicker due to the automatic winding unit: 5.5mm compared to 4.47mm.

Replacement Prices:

Replacement prices for the 8N24 were found online for around $65.00 – $75.95 USD. When ordering wholesale from Miyota, there may be a minimum order quantity of 100 pieces.


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Miyota Caliber 8N33 Watch Movement | Caliber Corner
22 days ago

[…] As of 2/2/2021, it appears that the caliber 8N33 is no longer featured in Miyota’s online catalog. If you are looking for a skeletonized Miyota movement, check out the automatic Miyota caliber 8N24. […]

7 days ago

Bulova Marine Star 98A106 has a Miyota 8N24 Gilt movement

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