Here is what he explained on YouTube:
This is an American Foundation for the Blind spring driven “talking book” record player that will play at either 24 rpm or 33 rpm. This is an earlier model from the mid 1930’s and these machines were loaned out to blind persons for the purpose of listening to talking book records. Even though the turntable portion is spring driven, the player uses a conventional tonearm / cartridge and the electrical output from the cartridge directly drives a pair of headphones. As you can see, some idiot removed the original tonearm and replaced it with a tonearm from a much newer player. I would like to find the correct tonearm for this player so that I can properly restore it.