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.
1954 LEGO Sets
In 1954 LEGO began its export of its sets under the System i Leg to neighboring Sweden and Norway. With the release of 18 new sets in this year, LEGO also released new window and door elements. The new window sizes were 1x6x4 (panorama), 1x6x3 (3 pane), 1x6x3 (shuttered), 1x4x3 and 1x3x3. The new door size was 1x2x4. Also a number of new Gift Package sets were release, all under the 700s series of sets. Also, the first 1x1 round bricks were introduced.