I remember Trost's. They were a supplier to some of the local Chicago metro hobby shops, of which there were many
in the '50s and '60s. All Nation was another of my favorites, but my home town had a really good hobby shop, so I only
ventured into Chicago occasionally, just to make sure I wasn't missing out on anything. No one bought from mail order
until the '70s, there was no need. But when the mail order houses started deeply discounting their stock, they started
stealing sales from the local brick-and-mortar stores. My local hobby shop had all the Kemtron parts in about twenty
large bin boxes, all catagorized by catalog number, no matter if they were for trains, cars, aircraft or what. You looked
up what you wanted in a counter copy of the Kemtron catalogue, then went to the appropriate bin to find what you
needed.