{"product_id":"swartchild-black-shield-super-mainspring-for-blancpain-39-alloy","title":"Swartchild Black Shield SUPER Mainspring for Blancpain 39 - Alloy","description":"\u003cp\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eSwartchild \u003c\/strong\u003e\u003cem\u003eBlack Shield \u003c\/em\u003eSUPER Mainspring for \u003cstrong\u003eBlancpain\u003c\/strong\u003e caliber 39 movements plus similar ébauche watches, white alloy, 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 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\/span\u003e\u003c\/p\u003e","brand":"Swartchild","offers":[{"title":"Default Title","offer_id":48939849056564,"sku":"PMS-SBSM039A-11","price":7.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-11-0619.25.28.jpg?v=1762486105","url":"https:\/\/www.vintagetimeparts.com\/products\/swartchild-black-shield-super-mainspring-for-blancpain-39-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}