[glyphmon]

For all the paper capacitors, including the two inside that C47 bakelite block you asked about, 630V is what I've gone with as a safe, standard, commonly available voltage, though it's not electrically necessary to be that high.

Guide (by Morzh) about restuffing those bakelite blocks in case you want to go that route: https://philcoradio.com/library/index.ph...soldering/

I believe Morzh has recommended to me in the past that the first electrolytic being 500V with everything else being 450V.  I'm new to this so which one is first vs not first is not a detail I'm yet able to tease out, so I should think 500V for any electrolytic should be safe.

Best wishes,
Roy