NuPower Mainspring for Venus caliber 175 (and variants) Chronograph - Alloy

NuPower Mainspring for Venus caliber 175, 178, 179, 185, etc. Chronograph movements and quite likely others as well, alloy, new in envelope. See images for further data 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.