First Day Cover Commemorates 100th Anniversary of Discovery of Insulin
This First Day Cover features Canada's 2021 Insulin stamp marking the 100th anniversary of the discovery of this life-saving diabetes treatment. It was canceled on the stamp's First Day of Issue, April 15, 2021, in Toronto, Ontario, Canada. The cover pictures old letters sent around the time insulin was discovered. On the reverse side of the cover is some of the history of insulin (in both English and French). Add this unusual cover to your collection today.