{"product_id":"kbk-mainspring-3836-for-elgin-4-0s-no-4789-steel","title":"KBK Mainspring #3836 for Elgin 4\/0s No. 4789 - Steel","description":"\u003cp\u003e\u003cstrong\u003eKBK \u003c\/strong\u003e\u003cem\u003eGenuine Factory\u003c\/em\u003e Mainspring #3836 for \u003cstrong\u003eElgin\u003c\/strong\u003e 4\/0s movements, Factory No. 4789, steel, new in envelope. See images for precise mainspring specifications. Not very familiar with the supply house (would love to find them in a catalog), but it says Genuine Factory and indeed the spring is marked E.N.Co on the end. I specialize is 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":"Kilb Beck Kuesel Inc","offers":[{"title":"Default Title","offer_id":49247819923764,"sku":"PMA-KBK3836S-08","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-08-1515.05.06.jpg?v=1786831532","url":"https:\/\/www.vintagetimeparts.com\/products\/kbk-mainspring-3836-for-elgin-4-0s-no-4789-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}