Canada Post unveiled a new stamp to to honour the De Havilland Beaver — a Canadian aviation workhorse – as part of its Canadians in Flight series.

But sharp-eyed aviation historians noticed a flaw. The aircraft pictured on the stamp bears the markings N995SP – an American registration owned by Sportsman’s Air Service, based in Anchorage, Alaska.
Read more: Beaver aircraft stamp fails to take off with Canadian aviators
“It is an amusing error,” said Brian Grant Duff of All Nations Stamp and Coin. “Obviously the aviation community is upset about this. And flying in planes is all about safety and attention to detail, so when something sloppy happens, the aviation community can get upset because they’re all about safety and attention to detail.”

Canada Post said the stamp shows the Beaver’s popularity far beyond the country’s borders.
Global News article: Beaver aircraft stamp fails to take off with Canadian aviators