Still the 1988 test. It’s the only "official" C14 test done. I’m aware of at least two "unofficial" anonymous, unpublishable, unauthorized tests that were done on very small pieces of absolutely authentic Shroud linen threads using more modern and better testing. Because the samples were small, the degrees of confidence are commensurately larger. Both returned ages comfortably in the mid-first century range plus/minus 75 years.
“Both returned ages comfortably in the mid-first century range plus/minus 75 years.”
Interesting. Please provide test documentation including labs, radiochemists and source tracebility.