[RodB]

I don't believe you will gain much by removing the cap just to read the code. The one in my set is buried in the same spot, under the tube socket pins, and the potential damage to both the tube socket and the cap far exceeds the possibility that this is a 4 mfd cap. Some early mica caps had a separate coding because manufacturers were pushing to have their parts become the standard. If you have the test equipment you can try measuring the cap in circuit. I'm showing you photos of my set so you can use them as a reference to install your caps. First is cap 42(code 125 schematic):

   

Now this is 33 and 35 at the right end of the terminal strip:

   

Then 46 connected to the center of the volume control:

   

Like I said, cap 35 is some sort of tubular and the colors are not decipherable. My set is not recapped but I replaced the ecaps and the audio coupling cap and the radio works. I'm hoping this puts the cap on this issue.