Waltham Factory Mainspring for Model 870 - 875 Movements No. 2253 - Steel

Waltham Mainspring for Model 870 - 875 running barrel (R.B) barrel shape movements, # 2253, steel, new in envelope. I specialize in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. See image for further details. Images do a pretty good job of representing the item.