2 x 3 Plates (cardboard box version)

Released in 1965, the LEGO 2 x 3 Plates set, identified as 519-1, represents a period when the company was expanding its foundational brick offerings to include specialized building elements. This set was produced as a supplement for builders to increase their supply of basic plate components, which were essential for creating flatter, more detailed structures compared to the traditional, taller bricks. The cardboard box packaging reflects the mid-century design aesthetic of LEGO products from the era, characterized by simple, functional branding intended for a growing international market.

The design of these elements stems from the patented interlocking brick system perfected by Godtfred Kirk Christiansen. By this time, the company had transitioned fully to acrylonitrile butadiene styrene (ABS) plastic, ensuring the durability and precise clutch power that the brand is recognized for today. The set was received as a practical necessity for enthusiasts, serving as a utilitarian building block that helped standardize the dimensions and versatility of the LEGO system, ultimately paving the way for the more complex sets that emerged in subsequent decades.