{"product_id":"marco-marshalloy-mainspring-4171m-for-elgin-938-waltham-853-forster-189-alloy","title":"Marco Marshalloy Mainspring 4171M for Elgin 938, Waltham 853, Forster 189 - Alloy","description":"\u003cp\u003e\u003cstrong\u003eMarco\u003c\/strong\u003e \u003cem\u003eMarshalloy\u003c\/em\u003e Mainspring 4171M for Elgin 938, Waltham 853, Forster 189, Kienzle 52, 52\/10 caliber movements, white alloy, new in envelope. See images for precise mainspring specifications. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item.\u003c\/p\u003e","brand":"C \u0026 E Marshall","offers":[{"title":"Default Title","offer_id":49100989333812,"sku":"PMS-CEM4171MA-04","price":10.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-04-2009.43.16.jpg?v=1776703582","url":"https:\/\/www.vintagetimeparts.com\/products\/marco-marshalloy-mainspring-4171m-for-elgin-938-waltham-853-forster-189-alloy","provider":"Vintage Time Parts","version":"1.0","type":"link"}