Some of Don's QSLs over the years
Don was 9DR from Minnesota while in college in 1917. 9DR QSLs provided by Rick McMorran, W6ANF.
In 1922, Don was issued 9ZT after passing the higher amateur theory and CW requirement. Stations with a Z prefix had special privileges.
9ZT 1924 card
Some others:
Don's 1933 QSL
One of Don's many cards from the 1980's
Don used the /A suffix to indicate he was operating from his home in Long Beach rather than the rhombic farm in Rolling Hills W6AM/A
This one is from the 1980's.
Don's 1980 and 1981 cards,
the ones he sent me!
Here's one of Don's FO0DCW cards from 1984 (courtesy AK5X).