{"product_id":"cas-ker-mainspring-for-rolex-chronograph-caliber-3135-alloy","title":"Cas-Ker Mainspring for Rolex Chronograph caliber 3135 - Alloy","description":"\u003cp\u003e\u003cstrong\u003eCas-Ker \u003c\/strong\u003eMainspring for \u003cstrong\u003eRolex\u003c\/strong\u003e Chronograph calibers 3130 to 3135 plus perhaps other as well, likely made by Bestfit, alloy, new in open package. I likely have several of these so the one you get may differ slightly from the images. I specialize in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.\u003c\/p\u003e","brand":"Bestfit","offers":[{"title":"Default Title","offer_id":49266851742004,"sku":"PMS-CKROL3135A-08","price":15.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-08-2416.10.39.jpg?v=1787613063","url":"https:\/\/www.vintagetimeparts.com\/products\/cas-ker-mainspring-for-rolex-chronograph-caliber-3135-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}