A well engineered brass model twin vertical cylinder marine engine with cylinders 5/8in. bore x ¾in. stroke, inlet and exhaust manifolds, displacement lubricator, frame incorporated trunk type crosshead guides, counterbalanced crankshaft with four main bearings disc flywheel and gear driven feed pump on cast bed, unpainted. Built by D.F. Sheppard -- 5½ x 6¾in. (14 x 17.2 cm)