Cherry Valley O-scale was created in 1962.

pay scale

The HO scale is used for measuring when it comes to model trains. Originally there was the O scale, or O gauge. When train models went to an even smaller size they created the HO scale to measure them.

HO is a gauge (scale) for model trains. The name HO comes from the fact that it represents a reduction of half from the earlier O gauge ("Half O"), which was more popular in Europe. The ratio for HO gauge equipment is 1:87 which means that the HO tracks are 16.5mm apart, or 1/87th of a standard train track (1435mm). In Europe, an almost exactly the same scale is called OO (pronounced "Double O"), even though it is much closer to half of O scale than double it (it is actually called "Double O" because there are two O's (OO) in the scale name).

It is the Fahrenheit scale.