The 1990 - 150th Anniversary of The Penny Black Silver Proof Crown is a commemorative coin issued by the United Kingdom in 1990. This single piece is crafted in silver proof quality and comes boxed with a Certificate of Authenticity (COA). It celebrates the historic event of the first adhesive postal stamp, known as the Penny Black, which was issued in 1840. The coin serves as a collectible piece that is not only a valuable addition to any numismatic collection but also a tribute to the intriguing history of postal services in the UK.