This is the earliest known type of mine car used in Bisbee mines. The car is first seen in drawings made of the Copper queen mine in 1881.  A single car was found in the Copper Queen incline shaft during the reopening of the Queen tunnel for tours. This car was used to hoist rock out of the shaft to the surface with a steam hoist.   They are an end dump car with the door latch located oddly on the door itself.  The cars have a steel plate covering ¾ of the top of the tub. The plate was to keep the rock from spilling out of the car into the shaft. The car could hold approximately one ton of material.