Supplemental sets are the parts packs of LEGO System i Leg, the System of Play that LEGO launched in 1955 to turn its bricks into one connected toy. Builders bought them to add more of the parts they needed, such as bricks in each size, windows and doors, roof bricks, plates and corner bricks. Others add details for the town plan of the time, such as Esso petrol pumps and signs, light masts, letter bricks, Danish and international flags and beams printed with Danish shop names.
1956 LEGO Sets
1956 was a milestone year in LEGO’s European expansion, with the opening of its first foreign sales company in Hohenwestedt, Germany. As sales increased, LEGO streamlined its Mursten line, discontinuing older panel-style windows and slotted bricks in favor of solid-wall designs compatible with the new System i Leg standard. The year’s sets included both basic assortments and play-focused models such as the VW Van, Traffic Police, and Esso Filling Station, emphasizing everyday realism. Individual brick sales remained limited to Scandinavia during this period.