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, No. 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