The 1831 Penny obverse features the bare head of King William IV facing right. The surrounding legend reads: 'GULIELMUS IIII DEI GRATIA', with the date 1831 below.' The UK 1831 Penny reverse shows the helmed Britannia seated facing right, holding a trident, hand resting on a shield. The legend reads 'BRITANNIAR: REX FID: DEF:', with a rose, thistle, and shamrock below. The penny is one of the great coins of the British coinage system. Derived indirectly from the old Roman denarius, it existed as a small silver coin from Anglo-Saxon times and then a large copper penny coin. Despite been commonly used coin, UK pennys are unique, old pennies that are worth significantly more money than originally intended. Working out how much old 1831 pennies are worth can be difficult, but we have tried to help inform you as to whether your old 1831 penny is valuable.