Postage Stamps:
- 1852 Guiana: One-Cent Black Magenta: The "One-Cent Black Magenta" stamp is considered the world's most famous and valuable stamp. Only one copy of this stamp exists, making it incredibly rare.
- 1862 Guyana Four-Cent Magenta: Another rare and valuable stamp from Guyana, the Four-Cent Magenta, was issued in 1862 and features a pink-magenta color.
- 1911 King George V Definitive: This definitive stamp series features various values and depicts King George V.
- 1966 Independence Series: This series commemorates Guyana's independence and showcases scenes of the country, such as the Demerara Harbour Bridge.
- 1980 Birds of Guyana Series: A set of colorful stamps featuring various bird species found in Guyana.
- 1992 Cricket World Cup Series: Stamps issued to celebrate the 1992 Cricket World Cup hosted by several countries, including Guyana.
Revenue Stamps:
- 1853 Guiana One-Cent Revenue: These revenue stamps were used for fiscal purposes such as legal documents, receipts, and various taxes.
- 1908 George V Revenue: This series of revenue stamps features King George V and various denominations.
- 1921 Arms of the Colony of British Guiana: Revenue stamps showcasing the coat of arms of the Colony of British Guiana.
- 1938 Crown: This series of revenue stamps depicts a crown as a symbol of authority.
Please note that these are just a few examples, and there are numerous other postage and revenue stamps issued by Guyana over the years, each with its own unique design and significance.