HR Quick Fit Mainspring No. K429D for Font 120, 123, Bulova 6AH, 6AM, Wittnauer 6FF - Alloy

HR Quick Fit Mainspring No. K429D for Font 120, 123, Bulova 6AH, 6AM, Wittnauer 6FF caliber movements, alloy, new in envelope. See images for all calibers supported and precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. 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 satisfactory job of representing the item.