Waltham Factory Mainspring for 0s 1891 Model No. 2220 - Steel

Waltham Factory Mainspring for 0s 1891 Model movements, No. 2220, steel, new in envelope. See image for further details. These came in several different strengths so you can select the one you need from the drop-down, but if you don't have a preference the .14 and .15 are fine for most applications. I also likely have several in each strength so the one you get may differ slightly from the images. Mainsprings have often been on the shelf for quite a few years but I inspect all these old steel mainsprings carefully before I list them, and I guarantee them unconditionally. I have several of these so the one you get may vary slightly from the image shown.