00n3

00n3 is the description given to modelling 3 ft narrow gauge railways in 4 mm scale with 12 mm gauge track. 3 ft prototypes were common in Ireland and the Isle of Man, but the scale is not generally used outside the British Isles. 12 mm gauge track is the same as that used in TT scale and HOm, so some components used for those scales can be used.

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