Ingersoll Mainspring for Waterbury Pocket Watch Factory No. 316 - Steel

Ingersoll Mainspring for Waterbury Pocket Watch, Factory No. 316, steel, tongue end, new in envelope. Measures Dennison 12 x 6 x 19-3/4. Distributed by Hammel, Riglander & Co in New York, O.R. #14. Could also very well fit in other dollar watches as well. Images do a satisfactory job of representing the item.