{"product_id":"marco-mainspring-2979-for-felsa-caliber-40-matter-caliber-109-steel","title":"Marco Mainspring #2979 for Felsa caliber 40, Matter caliber 109 - Steel","description":"\u003cp\u003e\u003cstrong\u003eMarco \u003c\/strong\u003eMainspring No. 2979 for Felsa 40, Matter 109 caliber movements, plus perhaps others, steel, 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":"C \u0026 E Marshall","offers":[{"title":"Default Title","offer_id":49075664290100,"sku":"PMS-CEM2979S-04","price":6.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-04-0119.29.35.jpg?v=1775097918","url":"https:\/\/www.vintagetimeparts.com\/products\/marco-mainspring-2979-for-felsa-caliber-40-matter-caliber-109-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}