The Switch tower is readily available and any Marx collector in the hobby
more than 5 minutes has probably seen one if not more! This tower, on the
other hand, is rather rare. Again we have one of those pieces made in England
or Canada that slipped in to the USA in Canadian train sets. These seem
to be from a short period of time in the 1950's.
According to Tasker Brush, these were sold in domestic sets as well.
The scarcity could be due to their late production dates.
(Courtesy of Al Woodward)