Waltham Factory Balance Staff for 6s Model 1873 No. 12318

Waltham Factory Balance Staff for 6s (and 8s) Model 1873 Movements, Factory No. 12318 (small waist), Refill #37, new in envelope. See images for further details.  I specialize in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.