The 2nd printing postcard was printed after the concert and has a "West Coast Lithograph" credit on the reverse. The orange is a bit more muted, the green darker, and outline of the woman a bit more blue. It measures 4 15/16" x 8 3/4".
The 3rd printing postcard matches the 3rd printing of the poster. It displays a "Creative Litho" credit, a brighter orange, a lighter green, a more purple outline, and it measures 4 7/8" x 8 1/4". It was also printed after the concert.
This 4th printing postcard (see BG029-4) matches its respective poster, with red, blue and gold colors. It measures 4 3/4" x 8 1/8".