Miyota Caliber 1n12

Miyota Caliber 1N12

Miyota Caliber 1n12

Manufacturer Miyota (Citizen)
Caliber Number 1N12
Type Quartz
Lignes 8.75”’
17mm x 18.5mm
2.58mm thick
Battery Cell Number 321 (SR616SW)
Battery Life
~2 years
Frequency 32,768Hz
Quartz Type Tuning fork type quartz crystal
Stem 065-505 (tap 10)
Hand Sizes 1.20mm / .70mm / .18mm
Jewels 0
Driving System
Two pole stepping motor
Hacking Yes
Functions Central hours, central minutes, central seconds, date calendar at 3:00
Country of Manufacture Japan
Known Models Eddie Bauer watch (add your watch to the comments below…)

The Miyota caliber 1N12 is a 0 jewel quartz watch movement. This caliber is made in Japan. The standard version of this movement features a date at 3:00, however, it is also available for watches with a date at 6:00 (designated as caliber 1N12-6). This caliber is sometimes incorrectly typed as 1N21.

1N12 Accuracy

Miyota states the accuracy of the 1N12 movement to be +/-20 seconds/month.

Replacement Price

At the time of this post the replacement prices for the 1N12 were found online for around $9.95.

Examples of watches with this movement

The movement pictured below was submitted by Chris, found in an Eddie Bauer watch. Please list your watch in the comments.

Miyota Caliber 1n12 Movement

Pros VS Cons:


  • Unlike Miyota calibers like the 2035, the arm that holds the battery cell down on the 1N12 is not near the coil, so there is less chance of damaging the watch during a battery change.
  • Does not require insulator film under the battery cell as on some Swiss quartz movements.
  • Cheap to replace.


  • The arm that holds the battery in place is attached to the main plate of the movement. If it snaps off during a battery change (rare) then you may need to find another watch to keep the battery cell in place.
  • Similar movements in this price range offer a longer battery life – although 2 years is still not too bad. Comment below if Miyota is accurate in claiming 2 years.

Additional Resources:

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