Excelsior #2884 ALARM Mainspring for 19 ligne AS Caliber 742 - Steel

Excelsior No. 2884 ALARM side Mainspring for 19 ligne AS Caliber 742 from the 1930's and beyond. Could also very well fit in other travel & alarm clocks. See images for precise mainspring specifications. 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.