Charles IV was the last king of Hungary. Work on the series of stamps for the coronation celebrations on 30 December 1916 did not progress well.
One result of the delay was the poor quality of the design, which was below the standards of the time, and the interchange of colours on the 10 and 15 fillér denominations. Originally, the 10 fillér was supposed to be red and the 15 fillér purple.
The imperforated pairs shown here are proofs on yellowish-brown paper without watermark. Interestingly, Charles ascended the Hungarian throne as Charles IV, but in the meantime became Emperor of Austria as Charles I and King of Croatia as Charles III.
