Caliber lookup
Movement reference
6601
Foundational Sportsmatic automatic, non-calendar (no day/date). Offered in 17/19/21-jewel grades; uses Seiko's bidirectional Magic Lever winding. 6601A from 1961, later 6601B revision.
- Type
- automatic
- Jewels
- 17
- Produced
- 1961–1969 ~
- Family
- Seiko 5 / Sportsmatic
In the catalogue
0 modelsNo models with the 6601 are in the catalogued sets yet — our extracted catalogues are mostly 1970s Japanese-domestic editions. More catalogues are being digitised.

