Tru-Temper Mainspring for Bulova caliber 5AB & 6AL + Benrus AE - Steel

Tru-Temper Mainspring for Bulova caliber 5AB, 6AL, Benrus AE, A.S. 1012, 1127 movements and perhaps others as well, steel, new in envelope. See image for precise specifications. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.