Donald J Mitchell was born in Ottawa, Canada, on 23 October
1930. He went to the Glebe Collegiate and the Ottawa technical High School.
In 1949/1950 Mitchell joined the Canadian Bank Note Company,
where he became the apprentice of the letter engraver John F Mash. Mitchell
himself also became a letter engraver, working on some 44 Canadian stamps. He
retired in 1996.
You will find Donald J Mitchell's database HERE.