LEGO 1973 / Universal Building Set Sets

LEGO's Universal Building Sets theme was released as early as 1966 but it was not until 1973 that the Basic LEGO sets became known as Universal Building Sets. These sets were produced in two set version numbers, the first was for sets that were sold in the UK, Europe, Canada and Australia. The other version numbers, but for the same exact set with the same box artwork was released in the United States. Most, but not all sets between 1973 and 1981 were sold in both regions.

1973 LEGO Sets

In 1973, LEGO introduced several new sets and themes, marking a significant year of innovation and expansion. One of the most notable developments was the introduction of the LEGO Town theme, which included the first minifigures with movable arms and legs. While these early figures lacked facial features and detailed printing, they represented a major step toward adding more realism and playability to LEGO sets.