Miyota Caliber 8N33

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.

Accuracy:

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

Video:

Update:

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.

Additional Resources

• Official caliber 8N33 drawings
• Official caliber 8N33 parts list

Photo of the silver 8N33 was submitted by Arash of the 8N33 powering his Aevig watch. The gilt movement pictured was submitted by Andrew from an 8N33 in a custom 40mm dress watch.