PM Merelloy Mainspring M236 - Waltham Model 678 movements No. 2262 - Alloy

PM Merelloy M236 Mainspring for Waltham Model 678 movements, Factory No. 2262, alloy, new in envelope. See images for precise characteristics. It is worth noting that HR thinks this will do as a 2217 as well. 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 an adequate job of representing the item.