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)

External links

• The History of Grand Seiko
• King Seiki: Special vs. Superior Chronometer
• The Myth of Seiko 5718-8000 Chronograph

Description: Manual winding movement Chronograph option Functions: Hours, minutes, central seconds Optional chronograph Data: 21-35 jewels 18,000, 19,800, 36,000 A/h Production period: 1960-1975