that arm in the middle is useful: you insert a slender metal bolt in the opening in the middle of the player and stack up to 5 singles or LPs on it. The arm holds the tower in place. When a record is finished, the next one will be released by a clever mechanism and the pick-up automatically gets set back to start position again. Handy when you're having a party. =)
Ah, I remember playing stacks of wax back in the 60s. The model we had was like a piece of furniture. If somebody from the 21st century looked at it, they'd probably think it was a cabinet or a hope chest at first.