A black and white portrait of the late king Don Carlos I. of Portugal

Front:
PHILCO SERIES 3460B. H.M. THE LATE KING DON CARLOS I. OF PORTUGAL ASSASSINATED FEBRUARY 18T, 1908

Back:
O'M POST CARD PHILCO LONDON, The Address Only to be written Here SERIES This Space may now be used for Communication to all Countries except United States, Spain & Japan THE PHILCO PUBLISHING CO., HOLBORN PLACE, 1889-1908 Reign