{"product_id":"seiko-diafix-deckstein-lagerstein-受石-cap-jewel-damenkaliber-4l-kompat-5s-5b-5ve-6si-s-6fa-1-stuck-nos","title":"Seiko DiaFix Cap Jewel \/ Bearing Jewel (受石 \/ Cap Jewel) – Ladies' Caliber 4L (comp. 5S \/ 5B \/ 5VE \/ 6SI.S \/ 6FA) (1 piece) – NOS","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eOriginal \u003cstrong\u003eSeiko cap jewel \/ endstone (受石 \/ Cap Jewel, Endstone)\u003c\/strong\u003e for the \u003cstrong\u003eDiaFix\u003c\/strong\u003e system from new old stock (NOS). This listing is for \u003cstrong\u003ea single piece\u003c\/strong\u003e, removed from an original \"SEIKO DIA FIX\" packet.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eDiaFix is Seiko's own mounting system for cap jewels at the pivots of the going train – typically on the escapement wheel (balance wheel) and third wheel pivots. The cap jewel (受石) is held by a spring-loaded DiaFix mount over the hole jewel, creating a defined oil reservoir at the pivot, which improves lubrication and smooth running. DiaFix was considered a quality feature of high-end Seiko movements from the 1960s\/70s (e.g., King\/Grand Seiko, where it was installed at numerous pivot points).\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eSize\/Type: \u003cstrong\u003e4L (レディー \/ \"Lady\")\u003c\/strong\u003e → for \u003cstrong\u003eladies' calibers\u003c\/strong\u003e. According to the original packet, \u003cstrong\u003e共通\u003c\/strong\u003e (common\/compatible) for Seiko calibers \u003cstrong\u003e5S, 5B, 5VE, 6SI.S, and 6FA\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe part is unused; due to storage, only minor, purely cosmetic marks are possible, which do not impair function.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eManufacturer: Seiko (K. Hattori \u0026amp; Co., Japan).\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-pre-wrap leading-[1.7]\"\u003eWarranty (used) This is an original part (NOS) stored for decades. The limitation period for claims for defects (statutory warranty) is 12 months from delivery.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-pre-wrap leading-[1.7]\"\u003eNote Before installation, please compare the stone dimensions (diameter\/height) and the DiaFix fit with the required cap jewel; installation should be carried out professionally.\u003c\/p\u003e","brand":"Vintage \u0026 JDM (Japan Domestic Market)","offers":[{"title":"Default Title","offer_id":53658366378322,"sku":null,"price":6.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0911\/3908\/0530\/files\/IMG-8734.heic?v=1780680417","url":"https:\/\/japanese-microbrands.com\/en\/products\/seiko-diafix-deckstein-lagerstein-%e5%8f%97%e7%9f%b3-cap-jewel-damenkaliber-4l-kompat-5s-5b-5ve-6si-s-6fa-1-stuck-nos","provider":"Japanese Microbrands - Mario Lenke","version":"1.0","type":"link"}