de Bolé Mainspring No. 540 for Bulova 10AN, 10AE, 10AB, 10AR, 10AM, 10AZ - Alloy

de Bolé No. 540 Redifit Alloy mainspring for Bulova caliber 10AN, 10AE, 10AB, 10AR, 10AM, 10AZ movements and perhaps others as well, 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.