I spotted this 1950 picture on the Buckles Blog, a blog that presents circus history from all over the world. I with this picture was bigger. According the blog post, “Here we see a Jeep with a power take-off in the process of raising the sides of each seat wagon. The outer corners were supported with long braces and then the front end of each vehicle would be lowered to form a grand stand.”
Lots more photos of Jeeps in this book….
Thanks Jim! I will buy a copy!