seiko_6800
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seiko_6800 [02.12.2022 20:38] – created - external edit 127.0.0.1 | seiko_6800 [03.12.2022 10:09] (current) – gerdlothar | ||
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+ | ====== Seiko 6800 ====== | ||
+ | **Cal. 68A** is the first of a family of ultra-thin watch movements produced by [[Seiko]] since [[1969]]. Today these movements are reserved for the upscale [[Credor]] brand. Other closely-related members of this **6800 family** include the **6810**, **6830**, **6870**, **6890**, **6898**, and **6899**. | ||
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+ | ===== Overview ===== | ||
+ | The 68 family was introduced in [[1969]] with Calibre **68A**, powering a series of ultra-thin dress watches from [[Daini Seikosha]]. The line continued with the [[1973]] introduction of **Cal. 6810**, which lasted in production for a decade. These ultra-thin watches were priced double the then-highlighted quartz models and more than four times the [[King Seiko]] and [[Lord Marvel]] lineup. By 1978, the 6810 disappeared from Seiko' | ||
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+ | Cal. 6810 reappeared in [[1991]] with the 110th anniversary " | ||
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+ | Cal. 6870 appeared in [[1993]] as a [[Credor]] version of Cal. 6810. It is a high-end ultra-thin [[manual winding]] movement intended to compete with similar thin calibres from [[Piaget]], [[Frederic Piguet]], and [[Jaeger-LeCoultre]]. All of the calibres in this family run at 21,600 A/h and measure just 1.98 mm thick. Most have 22 jewels, including cap jewels on the [[escape wheel]], [[fourth wheel]], and [[third wheel]]. | ||
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+ | In [[1996]], Seiko introduced the skeletonized Cal. 6898, a total redesign of the movement. The balance wheel was moved opposite the crown thanks to a return to the circular shape, and the bridges were redesigned. A small-seconds version of this movement, Cal. 6898, appeared in 2005 and a two-handed version, Cal. 6890, in 2009. | ||
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+ | Cal. 6830, introduced in [[2016]], is a [[tourbillon]] version of Cal. 6800. It was used in the rare [[Credor]] Masterpiece series, model GBCC999, GBCC997, and GBCC996. Seiko claims that it is the world' | ||
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+ | The Calibre 68 family is assembled at Seiko' | ||
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+ | ===== Technical Notes ===== | ||
+ | Calibre 6810 and 6870 are roughly [[tonneau]]-shaped, | ||
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+ | The 6800 family uses the classical 17-jewel arrangement, | ||
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+ | The [[pallet fork]] features a dog-leg bend, allowing the [[escape wheel]] to sit lower than the [[roller jewel]]. This also reduces thickness while still allowing a reasonably-sized [[balance wheel]]. The [[balance]] was also optimized, with a glued staff and integrated roller jewel to reduce thickness. It uses finely drilled holes for adjustment rather than screws of an adjuster, and the balance stud carrier is sunk into the balance cock itself rather than attached to it. | ||
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+ | ===== Watches ===== | ||
+ | The Seiko 6800 family was used in just a few watch models | ||
+ | |||
+ | * 6800 | ||
+ | * 6800-6000 (round) | ||
+ | * 6810 | ||
+ | * 6810-3070 (tonneau) | ||
+ | * 6810-0010 (wide lug) | ||
+ | * 6810-0080 (tapered lug) | ||
+ | * 6810-0060 (round) | ||
+ | * 6810-3100 (tonneau) | ||
+ | * 6810-6000 (110th Anniversary SCQL002) | ||
+ | * 6810-8000 (1990' | ||
+ | |||
+ | ===== Variants ===== | ||
+ | ^Movement ^Winding ^Hands ^Date ^Subdial ^Jewels ^Finish ^ | ||
+ | |68A |Manual |Hour, minute |None |None |? | | | ||
+ | |6810 |::: | ||
+ | |6830 |::: | ||
+ | |6870, 6890 |::: | ||
+ | |6899 |::: | ||
+ | |6898 |::: | ||
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+ | |||
+ | ===== External links ===== | ||
+ | * [[https:// | ||
+ | * [[http:// | ||
+ | * [[http:// | ||
+ | * [[http:// | ||
+ | * [[http:// | ||
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+ | |||
+ | <WRAP ud ud_mov> | ||
+ | |||
+ | **Description: | ||
+ | * [[Manual winding]] ultra-thin movement | ||
+ | |||
+ | **Functions: | ||
+ | * Hours, minutes | ||
+ | * [[Small seconds]] | ||
+ | |||
+ | **Data:** | ||
+ | * 21, 22, or 26 [[jewels]] | ||
+ | * 21,600 A/h | ||
+ | |||
+ | **Production period:** | ||
+ | * Since [[1969]] | ||
+ | </ | ||
+ | |||
+ | {{tag> | ||