ScaleSeven (S7) is a set of finescale
model railway standards for 1:43.5 (
7 mm scale) using true-to-prototype track and wheel standards. It is principally used to model British
standard gauge (4 ft 8-1/2in),
Irish Broad Gauge (5 ft 3in), or
Great Western broad gauge (7 ft 0-1/4in).
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