The set originally came on a quasi-ballasted track with a gauge of 16.5 mm and was described as H0, or "Half O." The earliest ...

And the simplicity of using N scale locomotive mechanisms to model HO scale narrow gauge equipment ... but that's not at all necessary. HOn3 track and trains are commercially available.

Kids and their parents were among the visitors who watched with fascination as trains rolled past on the six scale miles of mainline track at the ... areas on the HO scale layout.