HR Mainspring No. 609 for Bulova 10AZ-10WZ & Font 1146 caliber movements

HR No. 609 steel mainspring for Bulova caliber 10AZ - 10WZ, Gruen 580, 581 & 582 and Font (ébauche) 1145 caliber movements. 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.