Brand new, genuine Seiko SII (TMI) NH38A automatic mechanical movement. It is the non-date version of the popular NH35/36 series, widely used for watch modding, repair, replacement, and custom watch building. 24 Jewels automatic movement. Hacking (seconds stop) function for accurate time setting. No date window – clean dial design. 21600 vibrations per hour (3Hz). Approximately 41 hours power reserve. Standard 3.8 o’clock crown position. Direct replacement for many watch cases. Stable, reliable, and widely used in watch mod community. 1 × Seiko NH38A Movement. 1 × Stem (as pictured). Professional installation is recommended. Well packaged to avoid damage during transit. If you need any other watch movements or parts (NH35, NH36, NH38, NH39), please check my store.