BOREL Mainspring 4540-EE for Mido caliber 1300 - Alloy

BOREL Mainspring 4540-EE for Mido caliber 1300 movements plus perhaps similar ébauche watches, white alloy, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. 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 barely adequate job of representing the item.