{"product_id":"marco-mainspring-3251-for-fef-caliber-190-210-222-ff-100-152-steel","title":"Marco Mainspring 3251 for FEF caliber 190, 210 \u0026 222 + FF 100 \u0026 152 - Steel","description":"\u003cp\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cstrong\u003eMarco \u003c\/strong\u003eMainspring 3251 for Fleurier caliber 190, 210, 222, Font caliber 150, 152 and Benrus caliber AS \u0026amp; AO plus perhaps similar ébauche watches, steel, new in envelope. See images for all supported calibers and 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\/span\u003e\u003c\/p\u003e","brand":"C \u0026 E Marshall","offers":[{"title":"Default Title","offer_id":48574954602804,"sku":"PMS-CEM3251S-05","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-05-0716.42.12.jpg?v=1746661445","url":"https:\/\/www.vintagetimeparts.com\/products\/marco-mainspring-3251-for-fef-caliber-190-210-222-ff-100-152-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}