CANADA "MILITARY" -- OFFICIAL USE ONLY -- COVER - ca1951-1957 --
-- ROYAL CANADIAN AIR FORCE -- COMMANDING OFFICER -- MATERIAL LABORATORY --
R.C.A.F. STATION ROCKCLIFFE - OTTAWA, ONTARIO --
to COMMANDING OFFICER - TECHNICAL SERVICES UNIT - R.C.A.F. - MONTREAL, QUEBEC !!
-- CANCEL IN USE - SEPTEMBER 1, 1951 to DECEMBER 2, 1957 !!