HR Mainspring A506 for 16s NY Standard #3349 / 3196 - Steel

HR Mainspring A506 for NY Standard 16s Movements, Factory No's 3349 / 3196, T-end, steel, new in envelope. Make sure you need the T end and not a hole end. See image for precise mainspring specifications. I likely have several of there so the one you get may differ slightly from the images. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.