Custom made O scale railroad equipment cabinet
Here is an O scale railroad equipment cabinet. These types of cabinets are often seen close by crossing gates and track block signals. The O scale model has a removable top which allows adding electronics if necessary.
I plan to add an ITT HQ300-3 bell sound module to go along with my MTH #30-11006 Crossing Signal. The sound module will be installed in the O scale electrical equipment cabinet.