The Pemco Hopper Car Loading/Unloading accessory looks to
be a dead-ringer for the Mantua-Tyco accessory. The hopper is the typical two-bay car included in the Tyco
line for many years. The car displayed in the Pemco catalog is lettered for Viriginian, same as the Tyco model.
I have not seen an example of this accessory and can not comment on the contents of this set from production runs.
The TrainWorld sales listing from 1982 has this item priced at $5.95.