BESTFIT Mainspring for Alpina 8-day Alarm / Car Clock T420-4

Bestfit System #77 Mainspring for Alpina 8-Day Car or Travel Clock, No. T420-4, Regular Tongue end, steel, new in envelope. See images for precise mainspring specifications. I find these very infrequently so grab them when you can. 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