seiko_4400
no way to compare when less than two revisions
Differences
This shows you the differences between two versions of the page.
— | seiko_4400 [02.12.2022 20:38] (current) – created - external edit 127.0.0.1 | ||
---|---|---|---|
Line 1: | Line 1: | ||
+ | ====== Seiko 4400 ====== | ||
+ | The first [[King Seiko]] and [[Grand Seiko]] model from [[Daini Seikosha]] used calibre **4420**. Produced from 1964 through 1968, these were high-end [[manual winding]] movements. | ||
+ | |||
+ | The **4400** family used a slower 18,000 A/h oscillation rate than the derived [[Seiko 4500|Hi-Beat Calibre 4500]], which replaced it in [[1968]]. But it was accurate enough for use in high-end [[Seiko]] watches and allowed Daini to challenge [[Suwa Seikosha]] in the production of Grand Seiko watches. One unique aspect of this movement in the [[King Seiko 44KS]] is that a tiny weight was attached directly to the [[hairspring]] to improve accuracy. This is often removed during servicing, since most watchmakers are unfamiliar with this practice. | ||
+ | |||
+ | The 4400 was best known as the movement used in the legendary [[Grand Seiko 44GS]]. Introduced in [[1967]], the 44GS set the styling trend for all future Seiko watches and has been revered ever since. Seiko even created a replica 44GS in [[2013]], powering it with a special hand-wound [[Seiko 9S55|9S64]] movement to duplicate the 4420 as closely as possible. | ||
+ | |||
+ | ===== Variants ===== | ||
+ | * 4420A - 27 jewels | ||
+ | * 4420B | ||
+ | |||
+ | ===== External links ===== | ||
+ | * [[http:// | ||
+ | * [[http:// | ||
+ | * [[http:// | ||
+ | * [[http:// | ||
+ | * [[http:// | ||
+ | |||
+ | |||
+ | <WRAP ud ud_mov> | ||
+ | |||
+ | **Description: | ||
+ | * [[Manual winding]] movement | ||
+ | |||
+ | **Functions: | ||
+ | * Hours, minutes, [[central seconds]] | ||
+ | |||
+ | **Data:** | ||
+ | * 27 [[jewels]] | ||
+ | * 18,000 A/h | ||
+ | |||
+ | **Production period:** | ||
+ | * [[1964]]-[[1968]] | ||
+ | </ | ||
+ | |||
+ | {{tag> | ||
seiko_4400.txt · Last modified: 02.12.2022 20:38 by 127.0.0.1