Accordingly, he brooch takes the form of the Royal Regiment of Canadian Artillery cap badge, which was designed in 1907 and consists of the profile view of a "9-pounder" field cannon emblazoned with the Regimental motto and battle honours, with the number 60 on the gun wheel, superimposed on a Canadian maple leaf made of 18 karat and 21 karat yellow and white gold; enhanced with platinum, which is encrusted with diamonds, the crown on the badge containing emeralds, rubies and sapphires.
Apparently, Birks and the royals go quite a way back with he jeweller having designed several pieces for the royals through out history. Some instances include -
1947: Birks produced a sterling silver jewel case presented to Queen Elizabeth I, a gift from the Black Watch (Royal Highland Regiment) of Canada.
1959: Birks produced a sterling silver bowl presented to Princess Alice, Countess of Athlone, a gift from the 4thPrincess Louise Dragoon Guards.
1963: Birks produced a sterling silver tray, presented to Princess Alexandra of Kent, a gift from the Queen's Own Rifles of Canada on the occasion of the Princess' marriage.
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