PM Clock ALARM Mainspring CS-300 for Juba Caliber 40 Alarm Clock

PM Packaged Material Mainspring suitable for Juba Caliber 40 Alarm clocks, ALARM side spring, Loop end, No. CS-300, steel, new in open envelope. See images for precise mainspring specifications. I specialize is hard to find watch & clock parts and all parts are unconditionally guaranteed. Images do a pretty good job of representing the item