What are some of the most rare and valuable stamps in history, and what factors contribute to their high value?
How do postal systems determine the face value of stamps, and what factors influence changes in postage rates?
What role do philatelic societies and clubs play in the community of stamp collectors, and what resources do they offer to enthusiasts?
How did the introduction of postage stamps revolutionize the postal system?
What are some rare and valuable stamps that collectors seek, and why are they considered so valuable?
How do differences in stamp designs and features reflect a country's cultural or historical heritage?
What security features are included in modern postage stamps to prevent counterfeiting?
How has the role and significance of stamps changed with the advent of digital communication and electronic mailing systems?
