The first day of issue was 13 JAN 1980. There are 2 covers for this series, one 20c and one 55c stamp:
20c First Flight Over the South Pole
55c Admiral Richard E. Byrd
Some more information about the artist Dave Paulley from the Unicover website:
Dave Paulley American 1931 –
Born and raised in a small town in northeastern Wyoming, Dave Paulley could be considered a self-taught painter, honing his skills through correspondence courses and receiving professional help from various artists. His early works were primarily western themes, but he later included aviation subjects as well. A prolific artist, Paulley has won many awards for his paintings, including several awards at the prestigious EAA art competition in Oshkosh, Wisconsin. Paulley paints from his “Western Wings Studio” in Osage, Wyoming.