Seiko Calibre 7000/7S/4R/6R/8R movement family

Designed by Daini Seikosha.

7005

7006

7S25. Known as Y675 when produced by SII for use in non-Seiko-branded watches.

7S26. Known as Y676 when produced by SII for use in non-Seiko-branded watches.

7S36

7S55

4R15

4R35

4R36

6R15

6R20

6R21

6R27

6R35

6R GMT

8R