{"product_id":"rezista-mainspring-293-for-eta-640-benrus-m-steel","title":"Rezista Mainspring #293 for ETA 640 \u0026 Benrus M - Steel","description":"\u003cp\u003e\u003cstrong\u003eRezista\u003c\/strong\u003e Mainspring No. 293 for Benrus caliber M and ETA caliber 640 movements plus perhaps others, new in envelope. See images for 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\/p\u003e","brand":"Rezista","offers":[{"title":"Default Title","offer_id":49305220350260,"sku":"PMS-REZ293S-09","price":5.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-09-2911.23.17.jpg?v=1790706411","url":"https:\/\/www.vintagetimeparts.com\/products\/rezista-mainspring-293-for-eta-640-benrus-m-steel","provider":"Vintage Time Parts","version":"1.0","type":"link"}