The Secret Society of Lathe Trolls

Hello! My name is Ian and i'm a 20 year old engineering student and collector/restorer of antique radios and other tube equipment. Recently I was given a Presto model Y (75a with a 1-c and 87a , no speaker) and a rek-o-kut g2 (16"). The 87a restoration will be familiar territory but the 75 won't be....