Marco Mainspring #3079 for ETA 875, Tavannes 384, 385, Tissot S-4 - Steel

Marco No. 3079 steel mainspring for ETA 875, Tavannes 384, 384K 385, 386K, Tissot S-4 and perhaps even others as well, new in envelope. See images for precise mainspring specifications. I specialize is 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.