PM Clock ALARM Mainspring CS-233 for Muller Caliber 26 F.K. Alarm Clock

PM Packaged Material Mainspring for Muller Caliber 26 F.K. Alarm clocks, ALARM side spring, Regular tongue end, PM No. CS-233, 1950’s or newer, steel, new in open envelope. See image 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