Marco Mainspring No. 3343 for Landeron Caliber 52, 53 Chronograph - Steel

C&E Marshall Mainspring No. 3342 for Landeron caliber 52, 53 Chronograph, steel, new in envelope. 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.