Waltham Factory Balance Staff for 18s Model 1857 Keywind No. 278

Waltham Factory Balance Staff for 18s Model 1857 Movements, Factory No. 278, new in envelope. First time being able to offer this staff made for the 1857 Keywinds, specifically the Series A sprung under model, P.S. Bartlett and Appleton Tracy & Co. grades. Hard to say when I'll have one again. I specialize is hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a suitable job of representing the item.