This is a Shelley China, England tall mug in bone china made to commemorate the coronation in 1937 of King George VI and Elizabeth, parents of the Queen Elizabeth II, and grandparents of Charles III. 

The tall mug measures 4 inches high, 3 inches in diameter and features sepia portraits of the king, queen with the royal princesses, Elizabeth and Margaret on the back.

The mug is in excellent used vintage condition with no chips, cracks or restorations. A great royal commemorative mug that is rarely seen.