Seiko's No.5 movement is 7S26, and Meiyou is Citizen 8200. Seiko's movement is fully automatic, and its automatic online design is very good. There is also a new pendulum splint, which is the same as that in Switzerland, but it is more troublesome to maintain than the west. The hairspring is so thin that it breaks easily. Can't have a big impact. Citizen's is semi-automatic, which is more convenient for maintenance. On the whole, no problem. I prefer the civic movement. On the other hand, the movement is the movement, and the watch is a watch. It is useless to make a good watch and a good watch case.