de Bolé Mainspring for Liengme 12.21, Certina 18-142 - Alloy

 de Bolé Redifit Alloy mainspring for Liengme (Gala) caliber 10.21, 12.21, Certina 18-142 movements and perhaps others as well, Gr Ref. 4932, 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.