78n18 scale
Prototypes
Main folder for prototype information.
Except for pure park/tourist lines, please tell us if you know of any 18-20in lines, particularly ones outside the UK, which aren't mentioned here! Eventually, we want this list to be as complete as possible. For example, there have been numerous mining railways around the globe, using 18-20in gauge.
UK
In United Kingdom there was several 18inch gauge lines.
USA
USA mostly had 18inch lines in or at mines.
Sweden
Sweden did not have any 18inch lines as far as I know, but I am not giving up the research .. 
There should at least by some mine railways, but sofar no details found.