O scale

O scale is a scale commonly used for toy trains and rail transport modelling. Introduced by German toy manufacturer Märklin around 1900, by the 1930s three-rail alternating current O gauge was the most common model railroad scale in the United States and remained so until the early 1960s. In Europe, its popularity declined before World War II due to the introduction of smaller scales.

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Source: Wikipedia · Image: Wikimedia Commons · Public domain

DIECASTVAULT

The scale-model shelf — die-cast cars, planes & trains, cataloged and cared for.

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