1) A specific type of model electric
train. Known both as H.O. scale and H.O. gauge. The letters come from "Half-O", since H.O. was originally half the size of an O gauge
train. The scale of H.O. is 1/67, and its gauge is 16.5mm. H.O. trains are the most
popular size in the world.
2) the scale of H.O. trains, which is 1/87. It can eb applied to trains, minitaure figures, or model kits.
1) Jimmy has a
set of H.O. trains running in his basement.
The Hobby
Shop carries H.O. trains
2) Are those model plains 1/
72 or H.O. scale?
This diorama is done to a precise H.O. scale.