Miyota Caliber 9U13

The Miyota caliber 9U13 is a quartz movement with 0 jewels. It is assembled in Japan and is considered to be a replaceable movement. Miyota also lists this caliber as having a long battery life.

In Miyota’s own words:

“Super slim movement. Perfect for designs with an ultra-thin profile.” –Source

Accuracy Rating:

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

Battery:

The battery in the 9U13 is a cell number SR916SW (aka 373). A new battery should get you up to 4 years of runtime.

This movement is equipped with a low battery indicator. When the battery is running low and needs replaced, the seconds hand will skip every 2 seconds.

9U13 VS 9U15:

There is a similar caliber 9U15 with the main difference being that the 9U13 has a central seconds hand and the 9U15 does not have a seconds hand. Note that the 9U15 also doesn’t have the low battery indicator mentioned above because it does not have a seconds hand.

Replacement Price:

At the time of this post, prices for the caliber 9U13 quartz movement were found online between $12.95 to $17.95 USD.

Note: The 9U13-00A (with the date at 3:00) is readily available from watch parts resellers and in bulk from Miyota. If you need a 9U13-00V with the date at 6:00, there is a minimum order of 1,000 pieces with a lead time of about 2 months.

9U13 Front, Back, Side:

Assembly / Disassembly:

Additional Resources:

• Movement specs from Miyota
• Official technical drawings
• Official instruction manual

Caliber found in a Bulova 97B162 and submitted by James Hamilton