A little "Waguwak" S4-0/20/4 class advanced steam industrial switcher. It's the same 3.04 glip narrow gauge as the S20 Foresight, already a small engine on a narrow gauge, but it's even smaller!
Despite the various similarities with the Foresight, this locomotive was built by a different manufacturer. It features a round cyclonic coal burning gas producer combustion system firebox, a high and a low pressure cylinder for compound expansion of steam, remote operation, automated control of throttle, sander, and cutoff, and air conditioning.













