This Oceanian country has an underwater post office. It is located 50 metres offshore and it is 3 metres below the surface. That post office even has a special cancellation stamp that can be used underwater. What is this country with the only underwater post office in the world?

This European landlocked country is the only country with a Philatelic and Numismatic Minister of the State. Simon Celli currently holds that post. What is this country also known as the Oldest Republic in the World?

Poste Italiane is the National Mail System of which country?

What is the Mail System started in 1929 for Vatican City and other Italians?

Which Royal Couple's wedding was featured on North Korean postage stamps in 1982?

Which country issued a commemorative stamp for Robert Burns' 160th Death Anniversary?

This country’s postal service issued a commemorative stamp depicting famous scientist Marie Curie (Polish). What is this country formerly occupied by Germany?

First Postal System of Iran used this Asian country’s stamps. What is this Asian country with a 169 years old Postal Service?

This stamp is the successor of the world’s first stamp. What is this stamp issued in 1840 depicting Queen Victoria?

On July 1, 2021, the Isle of Man issued a commemorative to honor Albert Einstein’s general theory of relativity. Who is another famous scientist honored in this series?

Many early USA stamps featured a portrait of George Washington. Who else was depicted on the very first USA general issue in 1847?

This mammal can be found on some postal fiscal stamps issued by the Colony of Tasmania in 1848. Who is this egg-laying mammal?

Captain Sturt was the first non-Royal to appear on an Australian stamp in 1930 to commemorate the centenary of his exploration of this river. What is this river, also the longest river in the Oceanian continent?

This country is known for its unique postal system that includes a service called 'Poste Restante', allowing travelers to receive mail at a designated post office. What is this country famous for its rich history and ancient ruins?

This Asian country is home to the world's largest postal network, with over 200,000 post offices. What is this country known for its vast population and rapid technological advancements?

This famous British stamp, issued in 1935, features a portrait of King George V and is known for its distinctive design. What is the name of this stamp?

This famous stamp, issued in 1948, features a portrait of Mahatma Gandhi and is known for its unique design. What is the name of this stamp?

Which country is known for its extensive use of the 'Poste Restante' service, allowing travelers to collect mail at designated post offices?

This Asian country is recognized for its unique postal system that includes a service called 'Speedpost', which guarantees fast delivery. What is this country known for its technological advancements?

What is the name of the first postage stamp ever issued, which features a profile of Queen Victoria?

This famous stamp, issued in 1918, is known for its printing error that made it one of the most sought-after stamps in the world. What is this stamp?

Who first coined the term "Philately"?

This country is known for its unique postal service that includes a feature called 'Registered Mail', ensuring secure delivery of important documents. What is this country famous for its rich cultural heritage and historical landmarks?

Which country issued the world's longest stamp in 2024?