1509/20

Regular Issues of 1973-1974

1509

10¢ 50-star & 13-star Flags

1510

10¢ Jefferson Memorial

1511

10¢ 'Zip Code' Mail Transport

1518

6.3¢ Stylized Liberty Bell

1519

10¢ Flags - coil

1520

10¢ Jefferson Memorial - coil