{"product_id":"newall-security-mainspring-529-for-waltham-12s-colonial-no-2237-steel","title":"Newall Security Mainspring #529 for Waltham 12s Colonial No. 2237 - Steel","description":"\u003cp\u003e\u003cstrong\u003eNewall\u003c\/strong\u003e\u003cem\u003e Security \u003c\/em\u003eMainspring #529 for \u003cstrong\u003eWaltham \u003c\/strong\u003e12s Colonial B Movements, Factory No 2237, steel, new in envelope. See images for precise mainspring specifications and further details. 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 and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.\u003c\/p\u003e","brand":"Newall","offers":[{"title":"Default Title","offer_id":48916270317876,"sku":"PMA-NEW0529S-10","price":6.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-10-1117.36.24.jpg?v=1760229578","url":"https:\/\/www.vintagetimeparts.com\/products\/newall-security-mainspring-529-for-waltham-12s-colonial-no-2237-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}