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

1973 marked major structural and product milestones for LEGO. The company ended its U.S. licensing agreement with Samsonite and established LEGO Systems, Inc. in Brookfield, Connecticut, giving LEGO direct control over its American distribution. DUPLO was formally branded as a standalone preschool line, expanding on the larger bricks first introduced in 1969. Early Town sets began to appear with simple, posable figures—precursors to the modern minifigure—bringing more life and movement to everyday scenes. LEGO’s catalog continued to grow rapidly, reinforcing its position as a leading global toy brand.