Highlights include rare Ghost Town memorabilia, including California or Bust Ghost Town panorama painting, circa 1940s-50s (est. $25,000) by artist Paul von Klieben, who worked directly with Walter Knott as his primary art director during the early years of the park; the two collaborated on the 151-inch-by-57-inch mural of a wagon train that became synonymous with the attraction. Additional von Klieben artworks include Under Attack (est. $5,000) a circa 1940s-50s painting for the Ghost Town exhibit; Through the Desert (est. $5,000) and On Schedule, from 1953 (est. $15,000).