Every year, the various European postal administrations issue stamps on a common theme. For 1991, the chosen theme was Europe in Space. As its contribution, the Channel Island of Guernsey produced a set of four stamps linking events in space with local happenings on the island. The fourth and final stamp in the set (above) showed the Apollo 11 Moon landing of 1969, which was the year in which Guernsey became a separate postal administration and began to issue its own stamps.
Stanley Gibbons catalogue number: