====== 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 (1960)|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. [[Grand Seiko 57GS|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 [[Seiko Lord Marvel|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 =====
  * [[http://www.seiyajapan.com/pages/the-history-of-grand-seiko|The History of Grand Seiko]]
  * [[http://seikoholics.yuku.com/topic/770/King-Seiko-Special-vs-Superior-Chronometer|King Seiki: Special vs. Superior Chronometer]]
  * [[http://watchopenia.blogspot.com/2013/05/something-beyond-my-reach-seiko-5718.html|The Myth of Seiko 5718-8000 Chronograph]]


<WRAP ud ud_mov>

**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]]
</WRAP>

{{tag>Movements Manual_winding_movements Seiko_calibres High-beat_movements Suwa_Seikosha_calibres}}