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Watch Movement - Automatic - Seiko NH35A
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NameSeiko NH35A
ManufacturerSeiko (Details)
Jewel Count24
Diameter (mm)29.4
Height (mm)5.3
Frequency (vph)21, 600
Hand WindingYes
Shock SystemDiashock

History: The Seiko/TMI/SII caliber NH35 is a hand-windable, hacking upgrade from the Seiko caliber NH25. It is one of the world’s most popular automatic movements and is widely available in many affordable/microbrand watches.

In the technical documentation, Time Module claims that the NH35A accuracy range is within -20~+40 seconds per day under normal conditions. The NH35 should be fully wound after about 55 manual turns of the crown.

Crown operation: 0 (against the case): Clockwise = Manual Winding / Counterclockwise = Nothing 1 (pulled out one click): Clockwise = nothing / Counterclockwise = Date setting 2 (pulled out two clicks): Time setting clockwise and counterclockwise
Seiko Holdings Corporation (セイコーホールディングス株式会社 Seikō Hōrudingusu Kabushiki-gaisha), commonly known as Seiko (/ˈseɪkoʊ/ SAY-koh), is a Japanese holding company that has subsidiaries which manufactures and sells watches, clocks, electronic devices, semiconductors, jewelries, and optical products.

The company was founded in 1881, when Kintarō Hattori opened a watch and jewelry shop called "K. Hattori" (服部時計店 Hattori Tokeiten) in the Ginza area of Tokyo, Japan. Eleven years later, in 1892, he began to produce clocks under the name Seikosha (精工舎 Seikōsha), meaning roughly "House of Exquisite Workmanship". According to Seiko's official company history, titled "A Journey In Time: The Remarkable Story of Seiko" (2003), Seiko is a Japanese word meaning "exquisite" or "success" ("exquisite" is usually written 精巧 from Chinese jīngqiǎo, while the meaning "success" is usually written 成功 from Chinese chénggōng).

From Wikipedia
Item created by: gdm on 2018-10-16 15:53:54. Last edited by gdm on 2018-10-16 19:05:51

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