Marco Mainspring #2744 for Gruen 460, 915, Kurth 384, LeCoultre 42, Recta MC-C - Steel

Marco Mainspring #2744 for Gruen 460, 915, Kurth 384, LeCoultre 42, Recta MC-C, Blancpain 42 caliber movements plus perhaps other ones as well, steel, new in envelope. See images for further data and 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 pretty good job of representing the item.