This 1967 commemorative stamp from Brazil honors Dia Meteorológico Mundial (World Meteorological Day), issued under the authority of the WMO/OMM. The design features a meteorological rocket rising through stylized blue cloud layers—symbolizing advancements in atmospheric research during the space-science boom of the 1960s. Printed in bold black and sky-blue tones, the artwork captures Brazil’s participation in global weather observation initiatives. A classic thematic piece combining science, space technology, and meteorology—highly desirable for topical collectors.