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4 Responses to Scale of Train
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Measure the distance between the two outside rails.
16.5 mm = HO/OO gauge
31.75 mm / 1.25 inches = O gauge
But since it’s 3 rail, once you know the gauge you can’t run just any manufacturers models on it. If it’s O gauge, it’s probably Lionel. If it’s OO/HO, it’s probably really old! Usually you can find the manufacturer’s name on the underside.
Nope, not without seeing it. I recommend you measure the distance between the rails and refer to the NMRA chart on page
https://nmra.org/sites/default/files/standards/sandrp/pdf/S-1.2%202009.07.pdf
If it’s HO and metal it’s probably Marklin (pre-60’s)?
or trix