Elgin Mainspring for 6¾ x 8 ligne FF 120, 123 Factory No. 6702 - Alloy

Elgin Mainspring for 6¾ x 8 ligne movements, Factory No. 6702, automatic (tongue) end, alloy, new in envelope. The 6¾ x 8 ligne movements are FF 120 & 123 ébauche based so this mainspring will fit many other movements other than just the specified Elgin, including (according to alternative sources) the UT 543. See images 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