This motion has very very low quality ending. The hairpspring is mounted counter clockwise. Steer clear of this movement if at all possible. There may be also a no-day version of this movement called the SH3130 (or often the AR3130) which is of equally bad high quality. The oscillator of https://bydatto3extendedrangespec94825.blog2news.com/33758768/the-ultimate-guide-to-rolex-aaa-vs-real