On July 1, 1969 Prince Charles was formally invested as Prince of Wales and Earl of Chester. He had been given these titles in 1958 and had, from the time of his mother’s accession to the throne been the Duke of Cornwall, the title traditionally held by the heir apparent to the British throne. This year marks the 50th anniversary of the event.
In 2017 Prince Charles surpassed the record set by his illustrious ancestor, King Edward VII, by becoming the longest-serving Prince of Wales in history.
His arms (above) appear very much like those of his mother except that his are differenced by a white label (repeated on both supporters and the badge for Wales as well); in place of the compartment there is a device intertwining his motto and his badges as well as a small shield with the arms of Cornwall; there is an inescutcheon for Wales; and the crowns on the helm, the two small shields and the lion supporter all have a single arch as befits a Princely crown rather than a royal one which has two arches.
God Bless the Prince of Wales!