{"product_id":"seiko-crown-spiralklotzchen-schraube-ヒゲ持ネジ-part-no-022150-nos-watch-part-1-stuck","title":"Seiko Crown – Balance Staff Stud Screw (ヒゲ持ネジ) – Part No. 022150 – NOS Watch Part – (1 Piece)","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eOriginal \u003cstrong\u003eSeiko hairspring stud screw\u003c\/strong\u003e from new old stock (NOS), \u003cstrong\u003epart no. 022150\u003c\/strong\u003e, for the \u003cstrong\u003eSeiko Crown\u003c\/strong\u003e model (Jap. ヒゲ持ネジ「クラウン」, \u003cem\u003ehige-mochi neji\u003c\/em\u003e = hairspring stud screw).\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThis small screw secures the hairspring stud (the holder for the outer end of the hairspring) – a functional original part that is often damaged or lost in vintage movements and is needed for the professional restoration of a Seiko Crown.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eHistorical Background – Crown and Grand Seiko:\u003c\/strong\u003e The \u003cstrong\u003eSeiko Crown\u003c\/strong\u003e was introduced in \u003cstrong\u003e1959\u003c\/strong\u003e by Suwa Seikosha and was based on the Marvel\/Lord Marvel, but brought profound technical advances: the \u003cstrong\u003eCaliber 560\u003c\/strong\u003e with a larger balance wheel (better isochronism), a larger mainspring barrel, and improved Diashock shock protection. It was precisely this foundation that led to the birth of the \u003cstrong\u003efirst Grand Seiko (1960, Caliber 3180)\u003c\/strong\u003e a year later – Japan's first watch to meet the testing criteria of the Bureaux Officiels de Contrôle de la Marche des Montres. The Crown is thus the direct technical link to the Grand Seiko line and a historically significant model for any serious Seiko collector.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe part comes from an \u003cstrong\u003eoriginal Seiko factory bag\u003c\/strong\u003e (Part No. 022150). \u003cstrong\u003eThe price is per piece.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eTechnical Data:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Seiko (original Japanese factory packaging)\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\n\u003cstrong\u003ePart:\u003c\/strong\u003e Hairspring stud screw (ヒゲ持ネジ)\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\n\u003cstrong\u003ePart no.:\u003c\/strong\u003e 022150\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\n\u003cstrong\u003eModel assignment:\u003c\/strong\u003e Seiko Crown\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\n\u003cstrong\u003eCondition:\u003c\/strong\u003e NOS – unused, from opened original bag\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Japan\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eNote\u003c\/strong\u003e Unused original part from old stock; the original bag is opened and may show slight signs of storage and age. Please verify the exact caliber\/model assignment (Crown series) against the specific movement before installation.\u003c\/p\u003e","brand":"Vintage \u0026 JDM (Japan Domestic Market)","offers":[{"title":"Default Title","offer_id":53632014123346,"sku":null,"price":4.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0911\/3908\/0530\/files\/1B6942F0-76AC-4C53-BC04-4AAD18835414.jpg?v=1780435566","url":"https:\/\/japanese-microbrands.com\/en\/products\/seiko-crown-spiralklotzchen-schraube-%e3%83%92%e3%82%b2%e6%8c%81%e3%83%8d%e3%82%b8-part-no-022150-nos-watch-part-1-stuck","provider":"Japanese Microbrands - Mario Lenke","version":"1.0","type":"link"}