it's a broken in half "S" link-tab, maybe it was replaced some time in the past, provided your stack isn't missing one that is
I photo edited it roughly back together to compare it to your links
thanks , nice work. i dont have any missing s tabs, so i assume its off an old one. that snapped perfectly in half , i couldnt tell a difference in the 2. mods i guess you can delete this thread unless you want to keep it around for johnnies awesome csi work.
jim, birthday was great, other than the new 40 year old title i acquired.