I’m seeing that a lot of people are searching for the Miyota 8215 movement and for information regarding it’s viability as an Eta replacement. I wanted to throw together some basic info and specifications for you regarding this movement.
The Miyota 8215 is Japanese made, an automatic movement designed for wrist watches and used by many different watch makers. The Miyota brand is a member of the Citizen conglomerate. As we know most wrist watch makers can’t produce their own movements and this quality Japanese movement is a good alternative for many companies including well known brands like Citizen, Invicta and Jacques Lemans.
The 8215 movement is a 21 jewel movement with a left rotation (unidirectional) winding system. It’s accuracy is a modest -20 to +40 seconds per day, not amazing, but acceptable for most low end watches. One glaring disadvantage to this movement that may annoy it’s users is it’s lack of a hacking mechanism. The lack of hacking means it’s unable to stop the second hand movement when the crown is pulled out to the quick set time position. This movement has a 40 hour power reserve which is more than adequate for most customers.
Another disadvantage to this movement for some, will be it’s low beat 21,600BPH performance. This will make the watch ‘tick’ more compared to 28,800BPH that many are accustomed to.
Overall this movement is not a bad choice vs some of the ETA offerings, but it’s lacking in several key areas. I would stick with ETA!