K4ERA 1934 Puerto Rico

Benjamin Lamboy, a.k.a. Benjamin Lamboy  Planas, K4ERA, later KP4CA, Silent Key (1921-1987). He was first licensed  in the 1930's.
According to his QSL card he was the "youngest K4." He was an National Guardsman activated for service in  Korea, where he was seriously wounded. 

QSL courtesy of W9TWV / N0JP
Info courtesy of W5KNE