For those of you in New Zealand there is a beautiful set of scale plans in the March/April, 2014 issue of Narrow Gauge & Shortline Gazette of Climax No 1203 which was built in 1912 for the Potate Timber Company and later sold to the Pukaweka Sawmills, Ltd. It has been preserved and is at the Shantytown Historical Attraction. If my trusty scale ruler is still accurate (my eyes too, lol) its 42 inch gauge.
Ben
Ben