Down the end, class 1366, is the closest i've found. Possibly part of the cornwall mineral railway due to the size, good for sharp curves, hauling heavy loads, bad for gradients with no front or rear axles. Manning Wardle used to make lots of those odd lads for overseas too. Could even be SA or NZ, but definitely in a quarry.
http://www.gwr.org.uk/nopanniers.html
R.