{"product_id":"bestfit-mainspring-ja652-for-seth-thomas-18s-factory-no-536-alloy","title":"Bestfit Mainspring JA652 for Seth Thomas 18s Factory No. 536 - Alloy","description":"\u003cp\u003e\u003cstrong\u003eBestfit \u003c\/strong\u003eMainspring MS-JA652 for \u003cstrong\u003eSeth Thomas\u003c\/strong\u003e 18s movements, Factory No. 536, alloy, new in envelope. See images for further details. I likely have several of these so the one you get may differ very slightly from the images. I specialize in hard to find watch parts 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":48489038086452,"sku":"PMA-MSJA652A-03","price":17.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-03-0315.44.23.jpg?v=1741045608","url":"https:\/\/www.vintagetimeparts.com\/products\/bestfit-mainspring-ja652-for-seth-thomas-18s-factory-no-536-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}