WATCH-CRAFT Mainspring 2751W for AS 340, 689, ETA 887, Gruen 240, 315, Bulova 10AL - Alloy

WATCH-CRAFT Mainspring 2751W for AS 340, 689, ETA 887, Gruen 240, 315, Benrus AL, Bulova 10AL caliber movements plus perhaps other similar ébauche movements as well, white alloy, new in envelope. See images for all supported calibers and 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.