Marco Mainspring #3229 for Font 189, Benrus V, A. Michel 115, Wittnauer 8PW - Steel

Marco steel mainspring No.3229 for Font 189, Benrus V, A. Michel 115, Wittnauer 8PW, AS 1179 caliber movements and perhaps many others, new in envelope. See images for 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 pretty good job of representing the item.