From the text “Yugoslav Airmail Envelopes with the Mount Triglav Design”, author Peter Suhadolc, FRPSL AEP

“On March 26, 1951, Yugoslavia issued a new airmail envelope (dimensions 155 x 103 mm) bearing in the pre-printed stamp the design of an airplane flying above Mount Triglav, which is the highest mountain in Slovenia and, at that time, also in Yugoslavia (designer Janez Trpin, engraver Sreten Grujić). The blue background was printed in offset, the pre-printed stamp and stripes in red with typography. The face value remained the same as that of the previous airmail envelope issues, i.e., 5 dinars, which was the postage for a normal letter with foreign destination. The airmail additional charge varied for each country and changed in time, so this charge was paid by affixing addi- tional stamps on the air cover.”

Don’t forget to to read the full article ‘Yugoslav Airmail Envelopes with the Mount Triglav Design’ by Peter Suhadolc in the latest Filatelist Magazine issue.