{"product_id":"newall-security-mainspring-107-for-gruen-caliber-845-steel","title":"Newall Security Mainspring #107 for Gruen caliber 845 - Steel","description":"\u003cp\u003e\u003cstrong\u003eNewall \u003cem\u003e\u003c\/em\u003e\u003c\/strong\u003e\u003cem\u003eSecurity \u003c\/em\u003esteel mainspring No. 107 for Gruen caliber 845 movements and perhaps other wrist watches, new in envelope. See images for precise mainspring specifications. 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\/p\u003e","brand":"Newall","offers":[{"title":"Default Title","offer_id":48907325407540,"sku":"PMS-NEW0107S-09","price":5.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-09-2715.48.25.jpg?v=1759013651","url":"https:\/\/www.vintagetimeparts.com\/products\/newall-security-mainspring-107-for-gruen-caliber-845-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}