Here are the possible solutions for money first issued in 48 clue
Answer
Clue
Relevancy
dmarks
Clue
Money first issued in 48
abe
Clue
Nickname of the man (born 2/12/1809) who gave the address at 18A, issued the 28A/45A, was the first elected president of the 60A Party, and whose name can be found in this puzzle's main diagonal
airmail
Clue
Its first stamps were issued in 1918
Definition
to send mail by airplane
ssn
Clue
John David Sweeney, Jr. was issued the first one (FWIW it was 055-09-0001)
