HR Quick Fit Mainspring No. K575 for Aurore 39 & Tissot 13.6-IT & 13.6-21T - Alloy

HR Quick Fit No. K575 white alloy mainspring for Aurore caliber 39 & Tissot caliber 13.6-IT, 13.6 21T, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. 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.