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
1950 continued the production of Automatic Binding Bricks and introduced seven new supplemental part packs—the earliest LEGO spare parts ever sold. Set 700A featured a mix of 2x2 and 2x4 bricks, establishing a standard for future assortments. These early sets were distributed primarily in Denmark, Norway, and Sweden and remained in production until the mid-1950s. Today, surviving examples are extremely rare, with few complete boxed sets known to exist.