BESTFIT Clock Mainspring suitable for Bayard B-200 Alarm - L400-1

Bestfit System #77 Clock Mainspring suitable for Bayard B-200 Alarm clock, specifically the ALARM spring, and likely other clocks as well, LOOP end, No. L400-1, steel, new in 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