The postcard shows an Iberia Airlines McDonnell Douglas DC-8-52. The Douglas DC-8 is a four-engined jet airliner, manufactured from 1958 to 1972.
Iberia Airlines, or Iberia as it is commonly known, is the largest airline of Spain, based in Madrid and is the Spanish flag carrier. By the mid 1960s, Iberia had accumulated a fleet of Douglas DC-8s.
Douglas DC-8 Wikipedia Entry
Iberia Airlines Wikipedia Entry