To amplify on Balifly's reply, and I am by no measure an expert on this topic, being a 1962 model-
Model 108- turntable, no base, no arm
Model 208- turntable, with base, no arm
model 298- turntable, with base, with arm
I believe that is the correct hierarchy. There will be those here to correct me if I'm wrong.
Good luck with your new find.