Archaeologists recently found what they believe to be a spindle whorl at a Viking site in Scotland. Although the article doesn't give a date (the archaeologists might not have gotten the results back from radio carbon tests yet), Wikipedia says that Vikings are typically dated from the 8th to the 11th century.
If you'd like to read more about this very old spindle whorl, see the full article here.
[Speaking of spindles and spinners, Ravelry's Tour de Fleece begins Saturday, July 4, and GBFG has a team this year, Team Vulcan Spinners! To join in the fun, see the guild's group here.]