My Mom still has her 301 that I sewed on years ago. Recently I cleaned and oiled it as it hadn't been used in over 35 years. Sews like a dream. I hope it will be mine one day.
If i'm not mistaken, short bed or long bed refers to the hinged platform to the left of the needle. If you're thinking one has a longer throat, they're both the same. Someone correct me if I'm wrong.