HR Quick Fit Mainspring K550 for ETA 790, Enicar 792, Benrus BP - Alloy

HR Quick Fit No. K550 white alloy mainspring for ETA 790, Langendorf 804 & 806, Enicar 792 & Benrus BP, new in envelope. See images for precise mainspring specifications. 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 marginally adequate job of representing the item.