Fair enough. I was extrapolating from my experience in Canada, where the currency has always (?) been decimal and George VI coins still pop up from time to time. (For the Americans, a coin of similar age and prevalence would be the wheat penny.)
That were minted during his presidency?
Sorry, a bit of American-context humor there. None of our currency has any living individuals depicted. The penny (or one cent piece, as its official name) has had Lincoln’s visage since 1909, the centennial of his birth. And from 1959 to 2008, the obverse side has pictured the Lincoln Memorial.
The Canadian pound. In the mid-19th century, the various colonies that would become Canada switched over to decimal dollar systems, which were slowly united.