sentences:  In August 1973 a second card was issued for one of the stamps in the set to mark the 400th anniversary of the birth of Inigo Jones, architect and designer.Over the next three years several more single cards, and a few sets were issued, from July 1976 onwards there has been a set of cards issued for every new set of commemorative stamps that has been issued.The first two cards issued, 1973 Cricket and 1973 Inigo Jones, are larger than the current cards, measuring 120 mm x 172 mm in size, while all cards issued from PHQ3 onward are 104 mm x 148 mm in size.