I only had to clean it and replace the usual capacitors (the electrolytic ones and some coupling capacitors) and to replace the speaker for the high frequencies. It was breaking into pieces.
After that, I was like new.
ECC81, ECH81, EF89, EABC80, EL84, EZ80, EM34 are the tubes working in this radio.
I googled the relevant datasheets and linked them here, because I don't own them.