The RCHA Cipher Window was presented to Observation Post de Hart (Op de Hart, home of the Ottawa Gunners) on May 26, 1995 by Colonel and Mrs. W.R. Dawes. The stained glass window with an inset of the cipher of the Royal Canadian Horse Artillery is on the 2nd floor of the Army Officers' Mess in Ottawa. It is in honour of the Officers and Men of the Royal Regiment of Canadian Artillery who served with NATO.
The cipher is proudly displayed by our Regular Force Field Artillery units, the 1st Regiment Royal Canadian Horse Artillery, the 2nd Regiment Royal Canadian Horse Artillery, and the 5e Régiment d'artillerie légère du Canada. To quote from the Standing Orders of the RCA:
"This badge is only used by RCHA units and associations as a crest. The RCHA Badge is based on the badge of the Order of the Garter which dates from 1348. The motto of the Order of the Garter, "Honi soit qui mal y pense" ("Shame on him who thinks this evil"), is not considered as a motto of the artillery."