Elgin Factory Mainspring for 22s 8-day No. 4935 - Steel

Elgin Factory mainspring, Factory No. 4935 for 22s 8-day movements, steel, new in a very frail envelope. Note that some of the envelopes are not marked. Has the typical Elgin DB&H end. Elgin mainsprings are typically coated in very old sticky grease and this one has attracted so much dust and dirt over the years it may need to be cleaned more than once before use. See images for further details. Images do a pretty good job of representing the item.