D4TIN 1930 Germany

QSL card sent to Barbara Dunn G6YL.
Started as a SWL in 1925.
Licensed in 1927 at EG6YL, Britian's first licensed YL.

D4TIN 1936:
Unknown operator, Ulm an der Donau.

QSL K8CX Collection
Info courtesy of K6EE