Marco Mainspring #2929 for Concord 38, AS 690, 1279 8-Day Movement - Steel

Marco Mainspring No. 2929 for Concord 38, AS 690, 1279 caliber 8-day movements and perhaps others, new in envelope. These are for movements designed to run for 8 days, which include primarily car and travel clock movements. See images for precise mainspring specifications. I specialize in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.