The main object in this image is a tank wagon intended to transport oil to service stations and refueling depots. The smaller containers were for other kinds of fuel and lubricants, or for smaller orders. It was owned and operated by the Standard Oil Trust.
The description states:
THE STANDARD OIL WAGON
These were the wagons that made Rockefeller wealthy. This is one of 30,000 items in 22 building on 2 1/2 city blocks, showing man’s progress since 1830. Located 130 miles west of Lincoln, Nebr., on U. S. 6 & 34.
–This card likely dates from the 1960s.