LEGO Classic / Supplemental Sets

Supplemental sets are the parts packs of the 1960s, sold so that builders could add to a basic set the bits they needed most. They held windows and doors in frames, plates in several sizes, corner bricks, gates and fences, turntables, wheels with axles and train couplers. Many of these parts were new at the time, and the packs were often the first way to get them, like the wheels LEGO introduced in 1962.

There are also printed packs of International Flags, flags of different countries to put on a building or a ship, and from 1970 a lighting pack for the 4.5 V electrics. The same packs were sold in many countries, and the numbering changed from market to market, so the same contents can turn up under more than one number.