How has the design and usage of postal stamps evolved since their inception in the 19th century?
What are the primary factors that determine the value of a postage stamp for collectors?
What are the security measures in place to prevent the counterfeiting of stamps, and how have these measures changed over the years?
How are commemorative and definitive stamps different, and how does each serve the postal system?
What is the process of stamp collecting (philately), and what makes certain stamps more valuable or sought after?
How has the design of postage stamps evolved over time, and what are some significant historical examples?
What are the different types of stamps, and how do they vary in terms of purpose and design?
What role do stamps play in philately, and what are some tips for starting and maintaining a postage stamp collection?
How do postal administrations around the world commemorate special events or celebrate cultural heritage through stamp issues?
What are some of the most valuable or rare postage stamps in the world, and what factors contribute to their high value?
