NuVigor Mainspring #150 for Waltham 37s 8-Day movements No. 2232 - Steel

NuVigor Mainspring No. 150 for Waltham 37s 8-Day 7j Auto / Car Clock & Travel Clock movements, Factory No. 2232, steel, new in frail envelope. See images for precise mainspring specifications. I specialize is hard to find watch parts and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item.