HR Mainspring A735 for Waltham 6/0s Jewel & 1942 Series No. 2226 - Steel

HR Mainspring A735 for Waltham 6/0s Model 1898 "Jewel Series" & 1942 movements, factory No. 2226 in steel, new in envelope. See image for precise characteristics. 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.