The knobs are original white Z and work as intended as do pushbuttons, push one in one pops out. Also knobs are not cracked or brittle.
It has a clean, secure 5 tube chassis, 6A8G, 6K6G, 6K7G, 6Q7G and6X5. I checked each tube and they all were above minimum value. The power cord is also in good condition so I tried the radio but I got no reception. This is one of those where you know the station is there but it just doesn't come in.
What I can see of the speaker looks good and there was static and humming coming thru. It will need to be checked by a qualified radio technician to establish working order. If I were to keep this I would have a cap job done and keep it forever. Radio measures about 13" W x 7 1/2" D x 9 H and weights about 11 LBS.
I tried to take as many angles as I could so check the photos (zoom in) and if any questions please ask. The item "1938 ZENITH Tube Radio Model 5S319, Beautiful Wood Cabinet EXTREMELY NICE" is in sale since Sunday, September 5, 2021. This item is in the category "Collectibles\Radio, Phonograph, TV, Phone\Radios\Tube Radios\1930-49". The seller is "radiobuzz1" and is located in Carlisle, Pennsylvania.This item can be shipped to United States, Canada, Bahamas, Uruguay.