RN Mainspring No. 237 for Gruen 210 - 211 - 212 caliber movements - steel

RN No. 237 mainspring for Gruen caliber 210, 211 & 212 caliber movements, steel, new in envelope. See images for mainspring 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.