Columbia Grafonola ID and Tips for tone arm

[jamess]

Hello everyone,
I am writing from Italy and I would like to ask you if you can identify the model of this columbia grafonola because I bought it without the tone arm and I wanted to understand which tone arm to look for;
I tried this arm of another Grafonola tabletop and it seems to fit well;
could an arm of this type originally have been fitted?
Thanks