The image is a photograph of a white sign with black text that reads "NSU 55 Class first introduced: 26 May 1954 Commonwealth Railways". The sign is placed on a wooden surface in front of a red wall. The text is written in black font and is centered on the sign. Below the text, there is a list of the class's specifications, including the number of cylinders in line, the engine capacity, and the fuel capacity. 

The sign also mentions that the class was introduced in 1954, which was the first class of locomotives in the United States. The locomotive is a diesel-electric locomotive, and it was manufactured in the early 20th century. The engine capacity is 3.6 liters in line. The fuel capacity is 750 gallons. The maximum speed of the locomotive was 15,300 lbs.

At the bottom of the sign, there are two logos, one for the British Railways and the other for the Company England. The company's logo is a green circle with a white outline and a white star in the center.