CAFDC500x2re Unitrade # 500 pair. Canada Post Replacement Cover
Unitrade # 500 pair First Day Cover
Canada Post Replacement Cover
Ottawa, 15 August 1969
Chung / Narbonne Specialized Catalogue: R134
Beginning in 1949, first day covers forwarded to the post office in Ottawa which were damaged or lost during processing were replaced with a specially designed cover. Eight different cachet designs are known. The practice continued until 1974.