OOOoooooh! A 38-116X!
You've got probably what I would call the pinnacle of Philco radio, and probably antique radio in general in terms of sound and quality. I had one of those that I sadly sold before I ever had the chance to get working (needed the space
)
The only thing that comes close IMO is the model 16, which predates your 1938 model by a couple years. In 1939 they came up with the "Mystery Control" gimmick, which sold well, but the sound quality doesn't even come close from what I understand.
Enjoy her! Be proud to know you have the best Philco ever made, and quite valuable as well.