HR Nivastar Mainspring G312 for NFT 525, Bulova 8AD, 8AH, Forster 611 - Alloy

HR Nivastar Mainspring G312 for NFT 525, Bulova 8AD, 8AH, Forster 611 caliber movements, plus perhaps others, white alloy, 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.