Seiko Calibre 57/560 movement family

Designed by Suwa Seikosha.

560, 1959.03

3180, Grand Seiko First, 1960.12

479, Seiko Crown Self Dater

341, Seiko Crown Special, 1961

57A

57B

5717A

5718A

5719A

5722A/430, 1963.08

5722B, Grand Seiko Self Dater (GSS)/Grand Seiko Calendar (GSC), 19,800 vph

5740A, Lord Marvel (LMK), 1964

5740B, Lord Marvel (LMK), 19,800 vph, 1966

5740C, Lord Marvel (LM36), 1966

5780

Some movements calibres were also manufactured by Daini Seikosha (5717A, 5740C).