Chicago, Milwaukee, St. Paul & Pacific Railroad Company dome car number 55 at Green River, Wyoming, on July 30, 1986. Milw Super Dome car No. 55 at Green River in in a freight consist with two bay-window cabooses in 1986. Jim rode this car to Seattle on it way to Alaska. Photo by J.M. Fredrickson. Other Subject Classes: dome car, bay-window caboose.