Trutex Unbreakable Mainspring for Record caliber 433 Pocket Watches - Alloy

Trutex Unbreakable Mainspring for Record caliber 433 19 ligne pocket watch movements, white alloy, new in envelope. See images for precise mainspring specifications. These are often found in older military grade pocket watches and Swiss made Ball watches. I likely have several of these so the one you get may differ from the images, including some that have no markings. 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.