Barker Intermediate 88, another restoration job.

[boater sam]

If it's just after WWII, then that might have limited the cabinet quality and parts supply. A lot of  Octal valves stockpiled for war use, inc magic eyes such as Y63 were cheap 1945 to 1960. Some actually made in USA and relabelled.

Maybe the 0.1uF AGC decoupling cap fell off or they forgot to install it. It might pass QA test without one!

  Can't see one on the circuit diagram of the nearest model I could find with 6V6 output valves, the later model I think. There is a 2000pf ceramic but that's a bit odd for a decoupler on AGC line I would think.