HR Mainspring A763 - for Waltham Model 678 No. 2251 - Steel

HR Mainspring A763 for Waltham 6¾ & 8 ligne model 678, Factory No. 2251, steel, new in envelope. See image for precise characteristics. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do an adequate good job of representing the item.