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Through the 1970s I had one of these*. It had five heads and would pinch two tapes together, read one and write the other. It ate tapes.
Eventually as the heads eroded, the gap in the heads was too wide.
Forget where it went. Like many other things.
*The tape is threaded all wrong. The top left reel should feed to the post to the left of the normal track and back up to top right. The switch in between controls them.