Citations › Source ID: 9

C32. ARTICLE: HO 1:87 Vehicles, Brickipedia, .

HO 1:87 Vehicles ... was introduced in 1955 and discontinued in late 1970. All of the models are in 1:87 scale, and all trucks in 1:90 scale. ... LEGO first made metal or plastic cars and trucks in 1953 to a scale of 1:43. These came in a variety of different sizes and styles. One was, for example a Ferguson Tractor, another was a VW Beetle. ... These 1:43 scale vehicles were not part of the LEGO “System of Play” but were produced by The LEGO Group. These vehicles were discontinued by 1958 in favor of the regular LEGO System of Play, known at that time as the Town Plan.

HO-scale vehicles made of metal were included in many 'Town Plan' sets starting in 1955. This set the scale for the models you could build with the plastic LEGO bricks.