Pix-jury
Defined in 2 dictionaries — Ballentine's (1916), Black's (1910)
Ballentine's Law Dictionary
James A. Ballentine · 1916
A jury of goldsmiths formed to test the coinage in England.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
A j'ury consisting of the members of the corporation of the goldsmiths of the city of London, assembled upon an inquisition of very ancient date, called the "trial of the pix."
Defined under Pix in Black's Law Dictionary.