2-4-4-2

This articulated wheel arrangement was rare in North America; example was the Mallet locomotive.

Most were built as logging locomotives, presumably to better negotiate the uneven (and often temporary) trackwork that characterized such operations.

Built by ALCO (shop # 53970), this locomotive is a Mallet Compound type, built for the Taupo Totara Timber Company for use on their 51 miles (82 km) TTT Railway between Putāruru and Mokai in the North Island.

To reach Mokai, this locomotive successfully negotiated the southern section with curves as tight as 99 feet (30 m) radius.

It is now preserved on the Glenbrook Vintage Railway, near Auckland, New Zealand, and is designated GVR Number 4.

Columbia River Belt Line No. 7 "Skookum" during restoration outside the Garibaldi shops, January 2018.