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Miyota Caliber 8n33

Miyota Caliber 8N33

Miyota Caliber 8n33

Brand Miyota (Citizen)
Caliber Number 8N33
Movement Type Mechanical, manual-wind
Diameter 11 1/2”’ (26mm)
Height 4.47mm
Jewels 17
Vibrations Per Hour
21,600 bph
Anti-Shock System Parashock
Power Reserve
42 hours
Winding Direction
Uni-directional (clockwise)
Hand Windable?
Hacking? Yes
Lift Angle 49 degrees
Stem 065-212
Dial Screws 929-610
Case Clamps
Case Clamp Screws
Hand Sizes
1.50mm / 1.0mm / 0.17mm
Functions Hours, minutes, central seconds
Country of Manufacture Japan
Known Models Aevig Thor, Laco Rostock (Add yours in the comments below…)

This caliber listing is incomplete and desperately needs a high quality photo of the caliber 8N33. Please donate one here.

The Miyota caliber 8N33 is is a manual wind skeletonized watch movement made in Japan. It has 17 jewels, beats at 21,600 bph and tells the time via a standard 3 hand display.

Color Choice

The caliber 83NN 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 claims that the caliber 8N33 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.

Replacement Prices

Replacement prices were found online for around $62.00 – $67.00 USD.

Usage in Microbrand Watches

There are only a small handful of watch brands using the Miyota caliber 8N33 in their watches (check the chart above and comments below), and interestingly none of them are using it as a skeleton dial watch.

From Marloe Watch Company:

“For the Coniston we’ve decided to use Miyota again and this leads us to the bigger sibling of the Derwent movement, in what’s called the 8N33. We’ve had a number of these movements in our test-bed for the past 4 months now, checking reliability and accuracy to be absolutely sure this is the movement for the Coniston – and it’s performed brilliantly.” –source

From Aevig Watch Company:

“A first for Aevig is the see-through caseback to show off the detailed Miyota 8N33 manualwind movement. Hand winding a watch satisfies the connection to the marvel a mechanical watch is. About 40 turns winds up the movement completely for no less than 40 hours p0werreserve. Do not overwind for this movement does not have a slip like automatic winding movements do.” –source


Additional Resources

Photo submitted by Arash of the 8N33 powering his Aevig watch.

Share your experience with the Miyota caliber 8N33 with the community below…