Radio station commercial carts and cart decks.

My latest obsession is to acquire these carts that were used at all radio stations for the commercials and station identification promos and a player for them. They are apparently more like 4-tracks, having no internal pinch rollers. I have a line on several machines. Hopefully I can come up with one. I think the tapes are a different size than the 8-tracks. But any analog endless loop technology is welcome here at the 8-Track Museum.

Here's one. As you can see, it looks like a big sideways toaster.