{"product_id":"hamilton-factory-mainspring-for-16s-17-21j-no-718040-317-steel","title":"Hamilton Factory Mainspring for 16s 17-21j No. 718040 \/ 317 - Steel","description":"\u003cp\u003e\u003cstrong\u003eHamilton \u003c\/strong\u003eFactory Mainspring for 16s 17 - 21 Jewel Movements (such as the 974 \u0026amp; 992), Factory No. 718040 \/ 317, steel, new in frail envelope. This is a tough strength to find. See images for further details. I likely have several of these so the one you get may differ slightly from the images. I specialize i\u003cspan style=\"font-size: 14px;\"\u003en hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. \u003c\/span\u003eImages do a pretty good job of representing the item.\u003c\/p\u003e","brand":"Hamilton","offers":[{"title":"Default Title","offer_id":49134370685236,"sku":"PMA-HAM718040S-05","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/products\/1679427763.jpg?v=1705284444","url":"https:\/\/www.vintagetimeparts.com\/products\/hamilton-factory-mainspring-for-16s-17-21j-no-718040-317-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}