C&E Marshall Marshalloy Mainspring 4236M for Standard (ST) 96, 96-4, 961 thru 969 - Alloy

C&E Marshall Marshalloy Mainspring 4236M for ST (Font/FHF) 96, 96-4, 961 thru 969 caliber movements, alloy, new in envelope. See image for precise mainspring specifications and further details. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.