Trufit Mainspring - Waltham 2242 for 8¾ Ligne Model 870 - Steel

Trufit Mainspring for Waltham 8¾ Ligne Model 870, Factory No. 2242, steel, new in envelope. B&C Trufit mainsprings were distributed by Barton & Chase of Philadelphia but I'm pretty sure they are made in Switzerland. See image for precise characteristics. 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.