Issued by Antigua in 1978 to commemorate the 25th Anniversary of the Coronation of Queen Elizabeth II (1953–1978), this attractive four-value set was overprinted “BARBUDA” for use in Barbuda. The series features regal portraits of Queen Elizabeth II and Prince Philip, alongside artistic depictions of the coronation ceremony at Westminster Abbey. Rich ornamental borders and vibrant denominations (10c, 30c, 90c, $2.50) enhance its visual appeal. As a Commonwealth commemorative issue with dual-island postal relevance, this set is highly collectible in MNH condition and popular among royal-themed collectors.