sentences:  Other early stamp designs by Cremona include issues commemorating technical education (1958), other issues commemorating the George Cross award (1958, 1959 and 1961), the 19th centenary of St Paul's Shipwreck (1960), an Anti-Brucellosis Congress (1964) and the First European Congress of Catholic Doctors (1964); the latter was the last set of Malta stamps issued during British colonial rule, having been issued two weeks before independence.Most commemorative issues from the mid-1950s until independence were printed by Harrison and Sons, but a few were printed by Bradbury Wilkinson or Waterlow.Malta achieved independence as the State of Malta on 21 September 1964, and on that day a set of six stamps was issued to commemorate the event.