Argyle SR & RL #18 "Old Star".

Based on the Baldwin SR & RL #18, this Argyle locomotive incorporates inside-frame Stephenson valve gear, alcohol or butane firing, feed water clack valve, hand pump in tender, whistle, safety valve, water glass, pressure gauge, blow down valve, regulator, and displacement type lubricator. Minimum radius is 1.6 meters. Available for both 32mm and 45mm gauge. R/C is optional.

Photo courtesy Sulphur Springs Locomotive Works.