(...) There used to be the Freestyle/Basic 3+ sets which only had 2xY bricks and used larger doors and windows (earlier 2x4x3 windows and 2x4x5 doors and later 2x6x6 doors and windows). Then there were 5+ sets which had slightly more complex pieces. (...) (24 years ago, 18-Dec-00, to lugnet.year.2001, lugnet.general)
