Jewel：24 jewels. Vibration frequency：21600 vibrations per hour (21,600 bph). √：Poduct material is strong, durable, long service life.
New Japan Made NH72 NH72A Automatic Watch Movement Black Skeleton 24 Jewels
Jewel：24 jewels. Vibration Frequency：21600 vibrations per hour (21,600 bph). √：Poduct material is strong, durable, long service life.
Japan NH71A Automatic Movement High Accuracy 24 Jewels 21600 bph With fixed ring
Vibration frequency：21600 vibrations per hour (21600 bph). Jewel：24 jewels. Stop second device(With Second hand stop). Fixed Rings x 1.
Japan NH72 Black Skeletonized Mechanical Movement 24 Jewels High Accuracy
Jewel：24 jewels. Vibration Frequency：21600 vibrations per hour (21600 bph). Stop second device.