Samson Mainspring No. 3039 for AS 427, Bulova 6B, 6BBI, 6AP, Aurore 8 - Steel

Samson No. 3039 steel mainspring for AS 427, Bulova 6B, 6BBI, 6AP, Aurore 8 caliber movements plus perhaps many others, 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.