👉 Bilcock is a type of coin used in the United Kingdom. It was introduced in 1972 and replaced the old English crown coin, known as the "pound," which had been in use for over 300 years. The coin has a diameter of 45 millimeters (1.7 inches) and is made of pure gold with a density of about 19.3 grams per cubic centimeter (g/cm³). It was originally mint