Excelsior #2952 Mainspring for Alarm / Travel Clocks - 36 x 3/0 x 48

Excelsior No. 3952 Mainspring for Alarm and Travel Clocks the 1930's and beyond, steel. Believe this is for an 8-Day travel clock. Measures a Dennison 36 x 3/0 x 48 - 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.