HR Everlast Mainspring E243 for ETA 1010, AS 748, Bulova 4AL, Benrus BD - Steel

HR Everlast Mainspring E243 for ETA 1010, AS 748, Bulova 4AL, Benrus BD caliber movements, steel, new in envelope. See images for 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.