Samson Mainspring No. 3027 for Bulova 7T, 7AT, 3AB - Steel

Samson No. 3027 steel mainspring for Bulova 7T, 7AT, & 3AB caliber movements plus perhaps others (the envelope suggests Gruen). 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.