seiko_5200
Differences
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| + | ====== Seiko 5200 ====== | ||
| + | Seiko' | ||
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| + | ===== History ===== | ||
| + | The **5200** family was introduced in [[1970]] as perhaps the last Seiko [[automatic]] movement of the classic period. It was designed and produced by [[Daini Seikosha]], one of two different watch companies under the Seiko Group umbrella. As the [[quartz crisis|transition to quartz]] began, many at Daini thought this would be their last chance to design an automatic movement, and competition between Daini and [[Suwa Seikosha]] led to aggressive engineering. The finished product was thoroughly modern, with up to date features like [[hacking]], | ||
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| + | The 52 Stream is comparable to Suwa's [[Seiko 5600|56 Stream]], introduced a few years earlier. Both were designed for mechanized mass production, though some members of the 5200 family were hand assembled and regulated. | ||
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| + | The first member of the family was the **5206**, introduced in [[1970]] in the [[Seiko Lord Matic|Lord Matic]]. But it was the [[1971]] introduction of the [[King Seiko 52KS]] **5246** that made this movement famous. A modest upgrade came a year later with the **5216**, which added a spring-loaded pawl to eliminate the risk of breakage if the date was changed around midnight. The line continued in use through the [[1973]] introduction of the **5256** but an industry shift to electronic watches meant the end of the line came in [[1976]]. | ||
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| + | Although it only operated at 28,800 A/h, Seiko classified this a " | ||
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| + | Because this was only the second bi-directional automatic winding movement ever produced by Seiko, it has some quirks. The reverse winding gear remains engaged when the [[date quickset]] is used, causing extra drag and causing concern for some users. The early 5206 version also suffers from a date pawl that can be broken if the date is set late at night, a common issue for many watch movements. | ||
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| + | The 5200 family was resurrected in the 1990's as the high-end mechanical watch market rebounded. The result was the [[Seiko 4S15|4S15]] and its derivatives. | ||
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| + | ===== Variants ===== | ||
| + | The 5200 family operates at 28,800 vph, in keeping with the high-end Swiss competition. | ||
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| + | The 5200 was produced in various quality standards, with a series of " | ||
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| + | * Note that the **5206** and **5216** came in both 23- and 25-jewel variants. The main difference between these two is that the 5206 require one to wait for a " | ||
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| + | ^Movement ^Date ^Winding ^Hands ^Date ^Subdial ^Jewels ^ | ||
| + | |5206A, 5216A |1970 |Automatic |Hour, minute, seconds |Day and Date |None |23 or 25 | | ||
| + | |5245A | |::: | ||
| + | |5246A |1971 |::: | ||
| + | |5256A |1973 |::: | ||
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| + | ===== External links ===== | ||
| + | * [[http:// | ||
| + | * [[http:// | ||
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| + | <WRAP ud ud_mov> | ||
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| + | **Description: | ||
| + | * [[Automatic]] movement | ||
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| + | **Functions: | ||
| + | * Hours, minutes, seconds | ||
| + | * [[Automatic]] winding | ||
| + | * Bilingual day wheel | ||
| + | * Date wheel | ||
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| + | **Data:** | ||
| + | * 23 or 25 [[jewels]] | ||
| + | * 28,800 A/h | ||
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| + | **Production period:** | ||
| + | * [[1970]]-[[1976]] | ||
| + | </ | ||
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| + | {{tag> | ||