Steel Mainspring for 16s New York Standard Dan Patch Stopwatch No. 3196

Unmarked Maker but likely Swiss made Steel Mainspring for 16s New York Standard Dan Patch Stopwatch, Factory No. 3196, T-end, new in envelope. See images for further details. The 3196 was used in other 16s watches but the one for the Dan Patch was a bit stronger than the typical 3196. 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.