10x8 Color satin finish vintage photograph signed in black ink by Paul D. Castenholz. Some light edge wear, otherwise, in good condition. Paul D. Castenholz joined North American Aviation (later to become Rockwell International) in the newly formed Rocketdyne Division in 1949. As an aerospace engineer, Paul was the manager of the teams that built the Redstone, Jupiter, Thor, Atlas and Saturn rocket engines that sent American astronauts into orbit in 1968 and landed the first man on the moon in 1969. As Rocketdyne Vice President and Program Manager, in 1973 he led the team that captured the government contract for the design and development of the Space Shuttle Main Engine. This lot came from the Jim Wiggins collection we purchased in July 2022. Jim Wiggins accumulated the most unique and valuable autograph collection over a period of 70-plus years. He obtained his collection either in person or by writing to persons of fame and notoriety. Comes with a full Letter of Authenticity from Todd Mueller Authentics.Comes with a full Letter of Authenticity from Todd Mueller Authentics.