Excelsior #2899 Mainspring for Alarm / Travel Clocks - 28½ x 4½ x 37

Excelsior No. 2899 Mainspring for Alarm and Travel Clocks the 1930's and beyond, Tongue end, steel.  Note while the mainspring is new the envelope has been handled quite a bit over the years. Measures a Dennison 28½ x 4½ x 37 - see images for further information. I specialize in hard to find parts so I usually have whatever you might need and all parts are unconditionally guaranteed. Images do a pretty good job of representing the item.