{"product_id":"citizen-original-ersatzteil-zugfeder-mainspring-aufzugsfeder-ぜんまい-grosse-8-1-40-0-085-245-mm-nos","title":"Citizen Original Spare Part – Mainspring – Size 8 ¾''' (1.40 × 0.085 × 245 mm) – NOS (1 Piece)","description":"\u003cdiv\u003e\n\n\u003cdiv class=\"standard-markdown grid-cols-1 grid [\u0026amp;_\u0026gt;_*]:min-w-0 gap-3\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cdiv\u003e\n\n\u003cdiv class=\"standard-markdown grid-cols-1 grid [\u0026amp;_\u0026gt;_*]:min-w-0 gap-3\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cdiv\u003e\n\n\u003cdiv class=\"standard-markdown grid-cols-1 grid [\u0026amp;_\u0026gt;_*]:min-w-0 gap-3\"\u003e\n\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eOriginal Citizen spare part – \u003cstrong\u003emainspring\u003c\/strong\u003e (German \"Zugfeder\", also winding spring\/drive spring, Jap. ぜんまい\/\u003cem\u003ezenmai\u003c\/em\u003e) from unused old stock (NOS). Offered is a single mainspring in original Citizen packaging with the historical \"CITIZEN MAINSPRINGS\" emblem.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cdiv\u003e\n\n\u003cdiv class=\"standard-markdown grid-cols-1 grid [\u0026amp;_\u0026gt;_*]:min-w-0 gap-3\"\u003e\n\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe mainspring is the energy storage of the mechanical movement: wound in the barrel (香箱), it is tensioned via the crown and drives the entire gear train by its relaxation. As a central power source and wear part, it fatigues over time, can take on a permanent set or break – a suitable replacement is part of every overhaul.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cdiv\u003e\n\n\u003cdiv class=\"standard-markdown grid-cols-1 grid [\u0026amp;_\u0026gt;_*]:min-w-0 gap-3\"\u003e\n\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eSpecification (according to original label):\u003c\/p\u003e\n\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\"\u003eSize: 8 ¾'''\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eWidth: 1.40 mm (Dennison thickness 3)\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eThickness: 0.085 mm\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eLength: 245 mm\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cdiv\u003e\n\n\u003cdiv class=\"standard-markdown grid-cols-1 grid [\u0026amp;_\u0026gt;_*]:min-w-0 gap-3\"\u003e\n\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eFor a movement-true, originality-oriented restoration, a genuine Citizen mainspring in original packaging is the first choice – especially for collectors who want to preserve the original condition of their watch.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cdiv\u003e\n\n\u003cdiv class=\"standard-markdown grid-cols-1 grid [\u0026amp;_\u0026gt;_*]:min-w-0 gap-3\"\u003e\n\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe part is unused (NOS) and comes from decades of storage. As with any true NOS part – comparable to original NOS vintage car spare parts – age is part of its authenticity: a stored carbon steel spring may have taken on a slight permanent set, lost some elasticity, or be superficially darkened\/slightly corroded. For originality-oriented collectors, this is precisely the appeal – a period-correct original part instead of a modern reproduction. Storage marks may also be present on the foil and packaging.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cdiv\u003e\n\n\u003cdiv class=\"standard-markdown grid-cols-1 grid [\u0026amp;_\u0026gt;_*]:min-w-0 gap-3\"\u003e\n\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eManufacturer: Citizen (Citizen Watch Co., Japan). The packaging and logo style roughly date the piece to the 1950s\/60s.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cdiv\u003e\n\n\u003cdiv class=\"standard-markdown grid-cols-1 grid [\u0026amp;_\u0026gt;_*]:min-w-0 gap-3\"\u003e\n\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eWarranty (used)\u003cbr\u003eThis is an original part (NOS) stored for decades. The limitation period for defect claims (statutory warranty) is 12 months from delivery.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cdiv\u003e\n\n\u003cdiv class=\"standard-markdown grid-cols-1 grid [\u0026amp;_\u0026gt;_*]:min-w-0 gap-3\"\u003e\n\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eNote\u003cbr\u003eFor those who value originality in a vintage watch – a particularly high standard in the Japanese collector's market – this genuine, period-correct Citizen mainspring is the right choice. Before installation, please check the condition and compare the dimensions (width × thickness × length) and the barrel fit with the target caliber; installation should be carried out professionally.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Vintage \u0026 JDM (Japan Domestic Market)","offers":[{"title":"Default Title","offer_id":53737574629714,"sku":null,"price":12.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0911\/3908\/0530\/files\/0BDD55B5-CEDE-407F-AFCC-6F55AF281418.jpg?v=1781362314","url":"https:\/\/japanese-microbrands.com\/en\/products\/citizen-original-ersatzteil-zugfeder-mainspring-aufzugsfeder-%e3%81%9c%e3%82%93%e3%81%be%e3%81%84-grosse-8-1-40-0-085-245-mm-nos","provider":"Japanese Microbrands - Mario Lenke","version":"1.0","type":"link"}