Tru-Time Mainspring for Bulova caliber 17AH, ETA 953 - Steel

Tru-Time Mainspring for Bulova caliber 17AH and ETA caliber 953 and perhaps others, 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.