BrickTrains-Sets
“The 181 train set with motor, signal, and shunting switch is a large Lego train set, with 148 pieces, of those being 4 wagons, which is the main train engine, the battery wagon, storage wagon, and Large tipper wagon. It also includes a signal piece as well, which sway back... More and forth when the train goes over it.”
BrickEconomy Member Review
“The 1972 LEGO Train Set 181 is a vintage set from the 4.5-volt era, featuring a battery-powered locomotive, flat car, hopper car, and shunting switch. The set's use of rare yellow window pieces adds a nostalgic touch, and although the signal switch is finicky, the overall performance is impressive.”