As buildings grew taller in American cities, many fire departments converted horse-drawn hook and ladder wagons into motorized aerial ladder trucks. This rig is typical of the conversions that served big cities like New York, Chicago and Los Angeles in the 1920s. The rig is pulled by a detailed model of the Mack "Bulldog" tractor from 1923. The truck features an open cab, giving the driver unlimited visibility while spotting the ladder at the fire scene. The trailer is complete with the main ladder, which can be built in the up or down position, along with a full complement of ground ladders, plus a tiller to steer around those tight street corners. Many of these trailers lasted for decades with periodic rebuildings, making this model an ideal starting point for a kitbashing project.