N.Y. Standard 16s Mainspring No. 3349 / 3196 (EXACT) - Alloy

N.Y. Standard EXACT Mainspring for 16s Movements, Factory No. 3349 / 3196, Alloy, new in envelope. See images for precise mainspring specifications. 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.