In 1968 a new Concessions Office was built. It replaced # 400, a 20' ex-USAAF Radar wagon. The # for the new Concessions office was # 400 - it was a 30' wagon. With the "old 20' # 400" not being used, it was renumbered to # 420 Computers. It had 3 windows on each side of the wagon. This wagon was # 420 Computers for one year - 1968. From 1974 thru 1977 this wagon was Lot Office # 220.
In 1969 # 360 Sound Equipment wagon became available as its contents went to # 71 wagon, a 21 footer. This # 360 wagon was then renumbered to # 420 Computers. This # 420 had 2 windows on each side, and the possum belly had a different profile. This was also an ex-USAAF Radar wagon.
In 1978 wagon # 196 - former Wild Mouse Iron - was rebuilt with solid walls, a door and windows with 3 different sections inside - Press Office, Mail, and Tickets. It was numbered # 136 and used through 1981.
Wagon #'s 400/420 and 360/420 are now at Circus World Museum.