I've had two jukebox wall boxes connected to my vintage-hi-fi via an adapter and an iPod for a few years. Vintage wall boxes are only designed to play the number of records in the carousel of a parent jukebox or a "hideaway." This will never be more than 200 and in the case of this model 160. It won't play any more than that number regardless of the number of mp3s on the iPod. Swopping the adapter and the iPods over using a second wall box, I increased the selections to 320, (no duff "B sides" with this system).
I've since taken it further and acquired another title card magazine from a damaged wall box. This model is unique as the title card magazines can be easily removed to facilitate the changing of title cards. With a third iPod my options increase to 480.
My wife thinks I'm mad, as I've a memory stick in the TV with a few thousand mp3s on it.
But she really understands that there's no "nostalgia element" with a memory stick.