This armilla (?) was not found in Northumberland, but in.    From Wordnik.com.  [Notes and Queries, Number 211, November 12, 1853 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc.] Reference

He was distinguished as an inquisitor at Piacenza, but is best known for his work, "Summa casuum conscientiae, aurea armilla dicta".    From Wordnik.com.  [The Catholic Encyclopedia, Volume 6: Fathers of the Church-Gregory XI] Reference

In humiliating contrast, one of China's few tangible rewards involved the set of Qing-dynasty instruments for observing the heavens-among them a Jesuit-designed quadrant, celestial globe and armilla-mentioned above.    From Wordnik.com.  [The Economist: Correspondent's diary] Reference

9D: Where to wear in armilla (wrist) - no idea.    From Wordnik.com.  [Rex Parker Does the NYT Crossword Puzzle] Reference

Weird (appropriate? coincidental?) that "armilla" has "ARM" in it.    From Wordnik.com.  [Rex Parker Does the NYT Crossword Puzzle] Reference