HR Mainspring No. 430 for Bulova 6AM, 6AZ, 6AH, 6AK & 6WM and other movements - Steel

HR No. 430 mainspring for numerous caliber 6 ligne Bulova watches; 6AM-AH-AU-AZ, 6BK-BL-BS-BU as well as Font 120, Aurore 123, Tavannes 090, and 420 plus perhaps many others, steel, new in possibly dirty envelope. See images for 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.