I know there was some discussion in Modelling Matters recently about V tipper but I thought this was more appropriate here.
I came across this when looking for something else:https://www.flickr.com/photos/waymansmo ... datetaken/
Unfortunately the photographer does not know the gauge.
Anyway as a result of that I looked up Nenthead mines and found their Facebook page that has some pics of different styles of skips, again gauge info is missing as are any dimensions.https://www.facebook.com/NentheadMines/ ... =3&theater
Some of it looks quite narrow:https://www.facebook.com/NentheadMines/ ... =3&theater
Edit. A response to Facebook query : Nenthead Mines 18 inches if my memory serves me correctly, which it does occasionally... Nick