LEGO Mursten is based on the original Automatic Binding Bricks from 1949. In 1952 the LEGO Group decided that they needed a more descriptive name for their brick sets and added the phrase LEGO Mursten, which translates to 'LEGO bricks' to the existing and new boxes, and in 1953 the sets were renamed simply LEGO Mursten.
1950 LEGO Sets
In 1950 LEGO continued the release of the original line of Automatic Binding Bricks and released 7 new sets, many of them supplemental part sets and represented the first spare parts packs produced by The LEGO Group, except for set 700A which contained 48 parts, 24 of each, 2x2 and 2x4 bricks. Most of these sets ran from 1950 to around 1955 and were only available in Denmark, Norway and Sweden.