What is Georgii iii regis?

"Georgii III Regis" refers to the Latin phrase meaning "of King George III." It typically pertains to the reign of King George III of the United Kingdom, who ruled from 1760 to 1820. His reign is notable for significant events such as the American Revolutionary War and various domestic reforms. The phrase may also appear on coins, documents, or legal texts from his era, signifying their association with his authority.