Plymouth Mainspring for Font caliber 60, 61, Benrus caliber BM - Steel

Plymouth mainspring for Font caliber 60, 61 & Benrus caliber BM movements plus perhaps others as well, steel, new in envelope. See images for further data and precise mainspring specifications. 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.