Luxembourg # 329-31 Europa - 1957 Complete Mint Set of 3

The theme for the 1957 Europa issue was "peace and welfare through agriculture and industry", although the 8 participating nations didn't share a common design. The Europa issue from Luxembourg, the key set of the 1957 issue, pictures a EUROPA tower topped with wheat and oak branches and the word PAX, for peace. (Luxembourg #329-31)