BESTFIT Open Loop Clock Mainspring for Mauthe German Clocks No. L300-1

Bestfit System #77 Mainspring for Mauthe German Clocks, OPEN Loop end, No. L300-1, 1950’s or newer, steel. 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