PERRET Mainspring for 5¼ ligne A. Schild caliber 1051 - Alloy

Fabrique PERRET Chx-de-Fds SWISS made NEOTALAUTOLUBRIFIES mainspring for A. Schild (AS) caliber 1051, 5¼ ligne movements and perhaps others, alloy, new in envelope. See images for precise mainspring specifications. So the word that is a mouthful roughly translates to auto lubrication, which means the mainspring supposedly doesn't need to be oiled when popped into the barrel. 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.