{"product_id":"swartchild-black-shield-mainspring-440791-for-16s-south-bend-no-17528-steel","title":"Swartchild Black Shield Mainspring #440791 for 16s South Bend No. 17528 - Steel","description":"\u003cp\u003e\u003cstrong\u003eSwartchild\u003c\/strong\u003e \u003cem\u003eBlack Shield\u003c\/em\u003e Mainspring No. 440791 for 16s \u003cstrong\u003eSouth Bend\u003c\/strong\u003e 1st model movements, Factory No. 17528, steel, new in envelope. See images for further details. 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":"Swartchild","offers":[{"title":"Default Title","offer_id":48408470356276,"sku":"PMA-SWBS440791S-12","price":8.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-01-0311.26.22.jpg?v=1735932556","url":"https:\/\/www.vintagetimeparts.com\/products\/swartchild-black-shield-mainspring-440791-for-16s-south-bend-no-17528-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}