Cas-Ker Mainspring 3511R for ETA 735 & Bulova 7AP, AH, AK, AN - Alloy

Cas-Ker Mainspring 3511R for Bulova 7AP, 7AH, 7AK, 7AN & ETA 735, 757 caliber movements plus perhaps similar ébauche watches, likely made by Bestfit, white alloy, new in package. I likely have several of these so the envelopes may differ slightly from what is shown in the images. See images for precise characteristics. 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.