What are the key features that determine the value and rarity of a postage stamp?
**Historical Development**?
What are some common tips for starting and maintaining a stamp collection as a hobby?
How do different countries approach the issuance and themes of their postage stamps?
What are the most valuable collectible stamps in the world, and what makes them so valuable?
How are stamps designed and what elements are typically considered in their artistic creation?
What is the history of postage stamps, and how did they revolutionize the postal system?
What impact has digital communication and electronic mail had on the production and use of traditional postage stamps?
How do postal authorities decide on the themes and subjects that appear on new stamp issues?
What are some of the most famous or rarest stamps in the world, and why are they significant?
