Miyota Automatic Movement

[jdavis]

I have a Miyota 21J movement that was removed from an older replica. The movement looks and runs good. I have little knowledge of this Japanese movement. I am considering saving it for some future project watch. Is this a movement worth saving or is it an unreliable throw away?

[Category 5]

In my experience Miyota makes a fantastic movement. I have a Miyota rep that's about 10 years old. The movement has never been service or regulated and is still within 10 seconds per day.

[alligoat]

Ziggyzumba also speaks highly of the Miyota 21j movement. You could use it as a dependable replacement for an asian 21j, for example, in another rep watch.

[crystalcranium]

Ziggyzumba also speaks highly of the Miyota 21j movement. You could use it as a dependable replacement for an asian 21j, for example, in another rep watch.

And the hands from an asian 21j are interchangeable with a Miyota. Save the datewheel overlay from the asian 21 though. The Miyota wheel is the wrong font and rarely lines up.

Only drawback is it's non-hacking.

[2005SUBMARINER]

i installed a new miyota 21j mvt on my asian PO works excellent BUT ! it has a very choppy sweep

if you can live with that then miyota will last you a very long time !!

[crystalcranium]

i installed a new miyota 21j mvt on my asian PO works excellent BUT ! it has a very choppy sweep

if you can live with that then miyota will last you a very long time !!

5 clicks/sec vs 8 clicks in a 28,000 bph

Miyota (Citizen) 8215 - Automatic

Debut 1977

ø 25.6 mm - H 5.3 mm

21 Jewels

21600 A/h

Power reserve 45 h

[Pugwash]

5 clicks/sec vs 8 clicks in a 28,000 bph

21,600 is 6 clicks a second. 28,800 is 8.

5 clicks a second is 18,000 bph

[jdavis]

Thanks for the information guys. I am glad to know that it isn't a POS movement. I will be putting the Miyota up for future use for a replacement movement or a project watch.