Line no. 7 began as a horse-streetcar-line in 1867 with a good success.

In 1897 began the first electric streetcars to run on this line. The cars were using rechargable batteries as power.

In 1902 the line became an ordinary electric streetcar line like the other lines.

The last day for the line to be a streetcar line was April the 24th of 1971. The nickname of the line was: The Wagon for the Old Age Pensioners. It was said, that the elder people of the company wanted to run the line, before they were retired.