The image is a photograph of a sign on a window sill. The sign is titled "Car 3" and is written in black text on a white background. The text is divided into three sections. 

The first section is about Adelaide Locomotive Works, SA. It states that of particular historic interest is the tiny four-wheeled carriage number, which was built in December 1877. The second section is from the North of the State. It mentions that the number was issued to the Port Pirie section of the Northern Northern Railway. The third section is a list of the number of people who died in the Great Northern Railway in the early 20th century.

At the bottom of the sign, there is a note that reads "By 1895, the record shows that number 3 had been equipped with sleeping equipment that allowed the carriage to take off-duty engines. In 1911, the carriage was finally taken off the passenger list and it was converted into a passenger car. This exhibit was held in the Museum and Qualifies as the oldest carriage preserved in South Australia."

Overall, the image appears to be a historical marker or information about the car's history and significance.