Registered cover franked with single 1954 $1.20 yellow green & rose red QE2 issue (SG 138) tied by fine strike of ST. JOHNS ANTIGUA cds dated 4 JUN 1956 with second strike and boxed 'ST. JOHN'S ANTIGUA' registration marking alongside. Addressed to USA with transit & arrival marks on reverse. A scarce issue used on cover, which was only in use for less than 2 years.