Elgin DuraPower Mainspring for 4/0s Grade 607 Automatic #6329 - Alloy

Elgin Factory DuraPower Mainspring 6329 for 4/0s Grade 607 automatic movements, alloy, new in envelope. See image for specifications. These were offered in a couple of different strengths and those that I can supply can be found in the drop-down list. I likely have quite a few of these so the actual one you receive may differ very slightly from the image. 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