Not sure what Seiko is doing with the KS line. One design, first 39mm with date and 6L movement, then in 37mm with a new 6R movement, no date. Now back to 39mm with date, but with a 6R!
None of which are particularly accurate or regulated, even if they were able to be, which is odd, given the sub brand’s heritage:
https://monochrome-watches.com/intro...3-specs-price/