Slovenia year 2013 stamp – Postojna Cave MNH

Slovenia year 2013 stamp – Postojna Cave MNH

Slovenia issued a commemorative stamp in 2013 featuring Postojna Cave, specifically highlighting the “Postojna Cave – the first underground post office.”

Here are the key details about the stamp:

• Theme: Tourist destinations of Slovenia / Postojna Cave – the first underground post office.
• Year of Issue: 2013 (Issued on March 22, 2013).
• Face Value: The stamp itself had a face value of €0.64 (Euro).
• Format: It was issued as both a single stamp and part of a Souvenir Sheet (Miniature Sheet).
• Joint Issue: The stamp was a joint issue with Austria, commemorating the opening of the world’s first underground post office in the cave in 1899, which operated under the Austro-Hungarian Empire.