Original SEIKO Capacitor Battery 3027.V1Z
Battery Size: MT516F
Seiko Movements: 3M21A, 3M22A, MT35, 3M207, V182, V187.
*NOTE* Comes with special black battery spacer that makes it the same diameter as MT616 battery.
** 3027.V1Z Replaces Seiko Capacitor Battery 3027.29Y**
Note: Mainly for Seiko and their Kinetic lines, but 3027.V1Z is also used in many other movements.