BESTFIT Clock TIME Mainspring for Mauthe 34, Kienzle 31-171, Seth Thomas A915-102, No. T335-1

Bestfit System #77 Mainspring for Mauthe 34, Kienzle 31-171, Seth Thomas A915-102, regular tongue end, No. T335-1, 1940’s or newer, steel, new in envelope. See images for precise mainspring specifications. I specialize in hard to find watch & clock parts and all parts are unconditionally guaranteed. Images do a pretty good job of representing the item