{"product_id":"marco-mainspring-3092-for-wittnauer-10t-10ts-52-eta-865-871-fef-170-steel","title":"Marco Mainspring #3092 for Wittnauer 10T, 10TS, 52, ETA 865, 871, FEF 170, Rolex 10½H  - Steel","description":"\u003cp\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eMarco \u003c\/strong\u003eMainspring No. 3092 for Wittnauer caliber 10T, 10TS, 56, ETA caliber 865, 871, Girard Perregaux caliber 86, Fleurier caliber 170,  Rolex caliber 10½ ligne size H movements plus perhaps similar ébauche watches, steel, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. I specialize is hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item. \u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"C \u0026 E Marshall","offers":[{"title":"Default Title","offer_id":49007444033844,"sku":"PMS-CEM3092S-01","price":6.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-03-28_14.39.31.jpg?v=1774734823","url":"https:\/\/www.vintagetimeparts.com\/products\/marco-mainspring-3092-for-wittnauer-10t-10ts-52-eta-865-871-fef-170-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}