HR Mainspring No. 475 for Bulova 4AH, 4AR, 4AT & Font 29, 54, 175 caliber movements

HR No. 475 steel mainspring for Bulova caliber 4AH, 4AR, 4AT, Font 29, 54, 175 & Felsa 415, new in frail envelope. See images for precise calibers supported and 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.