Waltham Factory Mainspring for 14s 1870 Model No. 2209 - Steel

Waltham Factory Mainspring for 14s Model 1870 Pocket Watch, Factory No. 2209, T-end, steel, new in likely frail envelope. Some of these have been on the shelf for probably 75 years or more but I inspect all these older steel mainsprings carefully before I list them, and I unconditionally guarantee them. See image for further details. Images do a marginally adequate job of representing the item.