Elgin Factory Mainspring for 18s No. 812 - Steel

Elgin factory mainspring, Factory No. 812 for 18s movements, steel, new in envelope. Has the typical Elgin DB&H end. These were available in several different strengths and those that I can supply are shown in the drop down list. Once upon a time I could find the 812 pretty easily, but no longer as they sell as quickly as I list them. While all mainsprings should be cleaned before use, the Elgin springs can be especially sticky and goopy. Images do an adequate job of representing the item and all items are unconditionally guaranteed.