Trufit Mainspring - Waltham 2239 for 6½ Ligne Model 650 - Steel

Trufit Mainspring for Waltham 6½ Ligne Model 650, Factory No. 2239, 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.