{"product_id":"seiko-ersatzteil-drittrad-三番車-third-wheel-o-ca-11-7-mm-1-stuck-nos","title":"Seiko Spare Part – Third Wheel for Seiko 90 Stopwatch (Cal. 9011 Family), Ø approx. 11.7 mm (1 piece) – NOS","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eOriginal \u003cstrong\u003eSeiko spare part – Third Wheel (三番車)\u003c\/strong\u003e from new old stock (NOS) for the \u003cstrong\u003eSeiko \"90\" stopwatch\u003c\/strong\u003e (caliber family \u003cstrong\u003e9011\u003c\/strong\u003e). \u003cstrong\u003eA single piece\u003c\/strong\u003e is offered in the original Seiko part bag.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eOuter diameter: approx. \u003cstrong\u003e11.7 mm\u003c\/strong\u003e – an unusually large measurement for a wristwatch movement, which fits well with the large-format stopwatch movement. The third wheel is a component of the going train and transmits power between the center wheel and the second wheel; it shows the typical spoked form with a pinion.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eAssignment: The original bag is labeled with \"三番車\" (Third Wheel) and \"90\" – the latter refers in this collection to the \u003cstrong\u003eSeiko 90 stopwatch (Cal. 9011)\u003c\/strong\u003e, a sought-after mechanical vintage stopwatch. Original going train parts for it are difficult to obtain today – particularly relevant for watchmakers and collectors who restore these stopwatches.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eNote on assignment: The assignment is based on the handwritten \"90\" identification and the matching diameter, not on a printed part number. Please compare the diameter, tooth count, pinion, and height dimensions with the required wheel before installation.\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 visual traces are possible, which do not impair the 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 diameter, tooth count, pinion, and height dimensions, as well as the fit, with the required wheel; assembly should be carried out professionally.\u003c\/p\u003e","brand":"Vintage \u0026 JDM (Japan Domestic Market)","offers":[{"title":"Default Title","offer_id":53657842975058,"sku":null,"price":19.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0911\/3908\/0530\/files\/13E25F70-314D-46A3-AF8C-81302087FD99.jpg?v=1780680389","url":"https:\/\/japanese-microbrands.com\/en\/products\/seiko-ersatzteil-drittrad-%e4%b8%89%e7%95%aa%e8%bb%8a-third-wheel-o-ca-11-7-mm-1-stuck-nos","provider":"Japanese Microbrands - Mario Lenke","version":"1.0","type":"link"}