This QSL card was first used in the 1930s and is the oldest known W3ABT QSL card.
Courtesy W2VRK
Reverse Side 
This QSL card was first used in the 1940s and into the early 1950s.
Courtesy WA3LKN
This rare W3ABT QSL Card was used for Field Day in the early 1950s.
Courtesy K2VFK
This W3ABT QSL Card was used starting in the early 1950s.
Courtesy K2VFK
This W3ABT QSL card was used from 1964 to 1969.
Courtesy W3PK
This W3ABT QSL Card was used from 1969 to 1972.
Courtesy W3KRB
This W3ABT QSL Card was used from 1973 to 1976.
Courtesy N3GJC
Reverse Side 
This N3KZ QSL Card was used from 1976 into the 1980s
Courtesy WA3FRP
This N3KZ was used in the 1980s and 1990s.
Courtesy DK7YY
This N3KZ QSL Card was used during the University’s 250th Anniversary in 1990. Note that this card incorrectly lists a 1924 founding date for the Club using callsign 3KZ.
Courtesy W3KRB
This W3ABT QSL Card was used for the CQ World Wide WPX Contest in May 2006
Courtesy WA3FRP
This W3ABT QSL Card was used to celebrate one hundred years of Amateur Radio at Penn
Courtesy WA3FRP
