{"product_id":"swartchild-black-shield-mainspring-for-hampden-16s-no-3696-steel","title":"Swartchild Black Shield Mainspring #4347 for Hampden 16s No. 3696 - Steel","description":"\u003cp\u003e\u003cstrong\u003eSwartchild\u003c\/strong\u003e \u0026amp; Co \u003cem\u003eBlack Shield\u003c\/em\u003e Mainspring #4347 for \u003cstrong\u003eHampden\u003c\/strong\u003e\u003cstrong\u003e \u003c\/strong\u003e16s ¾ plate movements, Factory No. 3696, steel, new in envelope. Swartchild Mainspring Catalog (which I sell) lists this as a Dennison 18 x 3. 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":48856040210740,"sku":"PMA-SWA4347S-08","price":12.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-08-1517.27.49.jpg?v=1755304328","url":"https:\/\/www.vintagetimeparts.com\/products\/swartchild-black-shield-mainspring-for-hampden-16s-no-3696-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}