OO gauge
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OO gauge or OO scale is the most popular standard gauge model railway standard in the United Kingdom, outside of which it is virtually unknown. OO gauge is one of several 4 mm-scale standards, and the
UK prototype model of a OO scale (1:76) British Rail Class 25 shown with an 18.0 millimetres (0.71 inches) diameter five pence coin
Hornby Railways Flying Scotsman locomotive on an OO gauge layout
Class 800 Euston Road 00 gauge model Railway at the NEC
OO scale (left) and HO scale (right) models of the EMD Class 66, showing the size difference.
4 mm scale
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4 mm scale is the most popular model railway scale used in the United Kingdom. The term refers to the use of 4 millimeters on the model equating to a distance of 1 foot on the prototype. It is also us
OO gauge
…is the most popular standard gauge model railway standard in the United Kingdom, outside of which it is virtually unknown. OO gauge is one of several 4 mm-scale standards (4 mm to 1 ft (304.8 mm), or 1:76.2), and the only one to be marketed by major manufacturers. The OO track gauge of 16.5 mm (0.65 in) – the…
Gryndene Halt, a station on Evaleight Light Railway, by the Sussex Downs 009 group