seiko_4s15
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+ | ====== Seiko 4S15 ====== | ||
+ | **4S15** is one of a family of high-end [[automatic]] watch movements from [[Seiko]]. Other closely-related members of this **4S** family include the **4S12**, **4S24**, **4S25**, **4S27**, **4S28**, **4S35**, **4S36**, **4S71**, **4S76**, **4S77**, and **4S79**. | ||
+ | |||
+ | ===== Overview ===== | ||
+ | The **4S** family was introduced in [[1992]] with the **4S35** as a higher-end automatic alternative to the mainstream [[Seiko 7002|700x]] and [[Seiko 7S26|7S]] families. The line is based on the [[King Seiko]] [[Seiko 5206|5200]] series from the 1970' | ||
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+ | The 4S15 was a high-end movement, adjusted to +15/-10 seconds per day from the factory. This is nearly as accurate as the " | ||
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+ | Once Seiko introduced the [[Seiko 6R15|6R family]], the 4S was moved upmarket and the simple movements were discontinued. The series was refreshed in [[1995]] with the addition of the more-complicated **4S71** and derivatives. These remove the date window and add subdials and complications such as [[small seconds]], [[retrograde day]], date and [[24 hour]] subdials, and [[power reserve indicator]]s. Since [[2007]], the 4S series has been limited to Seiko' | ||
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+ | This family of movements powered Seiko' | ||
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+ | The Calibre 4S family is assembled at Seiko' | ||
+ | |||
+ | ===== Variants ===== | ||
+ | The 4S family operates at 28,800 A/h, an unusually [[high beat]] rate for Seiko. | ||
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+ | There are essentially three " | ||
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+ | - The **4S15** and derivatives (4S12, 4S15, 4S24, 4S25, 4S28, and 4S35) are simpler movements with few complications directly derived from the [[Seiko 5206|5200]] line. They were used for mid-range watches while Seiko developed the less-expensive [[Seiko 6R15|6R]] family of movements. | ||
+ | - The family moved upmarket with the **4S71** and derivatives (4S77, 4S79, and 4S79A). These add complications to compete with higher-end Swiss watches and powered the first Brightz and Credor automatics. The ultimate 4S movement was the hand-crafted 4S79 used in the limited-edition Credor GBAY992 and GZAY999 (limited to 500 and 20, respectively), | ||
+ | - The final family members were complicated movements exclusively used in Brightz and Credor watches, including the 4S27/4S77 and 4S36/4S76. | ||
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+ | Special note: The 4S15, 4S25, and 4S35 are all essentially the same movement. The 4S15 is the base model, with the 4S25 being essentially identical on paper. The 4S35 is adjusted to +15/-10 seconds per day, while the others are certified to +25/-10. | ||
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+ | |||
+ | ===== Applications ===== | ||
+ | * 4S12 | ||
+ | * Seiko SCFF, SUS GMT | ||
+ | * 4S15 | ||
+ | * Brightz (SAGN), Laurel (LHAM), Alpinist (SCVF), Titanium Diver, SUS Military, King Seiko LE (SCVN001) | ||
+ | * 4S24 | ||
+ | * Seiko (SCVG), Laurel LJAL | ||
+ | * 4S25 | ||
+ | * Seiko (SCVJ) | ||
+ | * 4S27 | ||
+ | * Brightz (SAGN) | ||
+ | * 4S28 | ||
+ | * Brightz (SAGN) | ||
+ | * 4S29 | ||
+ | * Laurel (LJAR), Brightz (SAGN) | ||
+ | * 4S35 | ||
+ | * Seiko SCVK001/2 | ||
+ | * 4S36 | ||
+ | * GMT Retrograde (SAEN, SARN) | ||
+ | * 4S71 | ||
+ | * Credor | ||
+ | * 4S76 | ||
+ | * Credor Node (GBBT, GCBT) | ||
+ | * 4S77 | ||
+ | * Credor Retrograde GMT (GCBG) | ||
+ | * 4S79 | ||
+ | * Credor (GBAY, GCAY, GZAY) | ||
+ | |||
+ | ===== External links ===== | ||
+ | * [[http:// | ||
+ | * [[http:// | ||
+ | * [[http:// | ||
+ | * [[http:// | ||
+ | * [[https:// | ||
+ | * [[http:// | ||
+ | * [[http:// | ||
+ | * [[http:// | ||
+ | * [[http:// | ||
+ | * [[https:// | ||
+ | |||
+ | |||
+ | <WRAP ud ud_mov> | ||
+ | |||
+ | **Description: | ||
+ | * [[Automatic]] or [[manual winding]] movement | ||
+ | |||
+ | **Functions: | ||
+ | * Hours, minutes | ||
+ | * [[Central seconds]] or [[small seconds]] | ||
+ | * Rapid calendar advance | ||
+ | * [[Automatic]] [[bidirectional]] winding | ||
+ | * [[Diashock]] | ||
+ | * [[24 hour]] [[GMT]] subdial | ||
+ | * [[Power reserve indicator]] | ||
+ | * [[Retrograde]] day | ||
+ | * Date wheel | ||
+ | |||
+ | **Data:** | ||
+ | * 21, 25, 28, 29, or 31 [[jewels]] | ||
+ | * 28,800 A/h | ||
+ | |||
+ | **Production period:** | ||
+ | * Since [[1992]] | ||
+ | </ | ||
+ | |||
+ | {{tag> | ||
seiko_4s15.txt · Last modified: 03.12.2022 14:06 by gerdlothar