Lot of 4 COQ Alloy (INOX) mainsprings for FONT caliber 60 movements

Lot of 4 COQ Mainsprings for FONT 60 caliber movements plus perhaps similar ébauche watches, alloy, new in case. See image for precise 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.