The Penny Black is one of the most significant inventions in history! Launched in 1840 with Queen Victoria’s profile, it revolutionized mass communication, enabling people across the UK to correspond. Before this, only the wealthy could afford messengers, and the recipient paid for delivery! Invented by school teacher Roland Hill, the self-adhesive stamp was initially mocked, but with politician Robert Wallace’s support, it paved the way for global communication. Now prized by collectors worldwide, original Penny Blacks can be valued from £100 to several million, depending on provenance and condition.