Seiko 5700

The Seiko 5700 family of movements powered many high-end Seiko models in the 1960's.

Produced from 1960 through the mid 1970's, these were high-end manual winding movements. The line began with the original Grand Seiko's Calibre 3180, which was later renamed 5720A. The next variants, calibre 57, added a calendar module that would be included on many successors. The next Grand Seiko's 430 movement was renamed 5722A, and was majorly upgraded to 19,800 A/h with 1966's 5722B. Another big jump came in 1967 when the Lord Marvel received a true Hi-Beat version, the 36,000 A/h 5740C.

The 5700 stream also produced a historic chronograph. Seiko was the official timer at the 1964 Tokyo Olympics and supplied a number of simple countdown chronographs with 5718A movements. There were also mono-pusher chronographs produced with the 5717 and 5719 movements.

Variants

3180/5720A (1960) - 25 jewels, Grand Seiko, 18,000 A/h
57A (1961) - 21 jewels, Crown Self Dater
57B (1961) - 21 jewels, Crown
5760 (1961) - 23 jewels, Crown Special
430/5722A (1963) - 35 jewels, Grand Seiko Chronometer, 18,000 A/h
5722B (1966) - 35 jewels, Grand Seiko, 19,800 A/h
5740A (1964) - 23 jewels, 57 Lord Marvel, 18,000 A/h
5740B (1966) - 23 jewels, 57 Lord Marvel, 19,800 A/h
5740C (1967) - 25 jewels, 57 Lord Marvel, 36,000 A/h
5717A (1964) - 21 jewels, Chronograph Calendar
5718A (1964) - 21 jewels, "Count Graph" for Olympics, 2+2 pushers, 2-hand subdial
5719A (1964) - 21 jewels, Chronograph (no date)