{"product_id":"marco-mainspring-111-for-16s-elgin-factory-no-817-steel","title":"Marco Mainspring #111 for 16s Elgin Factory No. 817 - Steel","description":"\u003cp\u003e\u003cstrong\u003eMarco \u003c\/strong\u003eMainspring #111 for \u003cstrong\u003eElgin\u003c\/strong\u003e 16s movements, Factory No. 817, steel, new envelope. See images for precise mainspring specifications.  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 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":47451904442676,"sku":"PMA-CEM0111S-10","price":12.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-03-03_16.26.25.jpg?v=1772584013","url":"https:\/\/www.vintagetimeparts.com\/products\/marco-mainspring-111-for-16s-elgin-factory-no-817-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}