[old_tv_nut]

Series dropping resistor for screen grids and DC restorer B plus - no reason for precision that I can see. I note there is only one 2 watt resistor in the bill of materials - cathode bias for the horizontal output. There are a few higher wattage wire-wounds, but all the other composition resistors are 1/2 watt or 1 watt.

The peculiar thing is that there is only 1/6 watt dissipated in each of those two 1-watt resistors (see Fig. 41). Maybe this was to keep a low temperature rise and prevent the value from drifting - I'm thinking the actual DC restorer B plus is not critical because brightness control setting takes care of it; unless it drifts, requiring readjustment of brightness. You could test this theory by connecting/disconnecting a 100k or so resistor across these two and see if the black level changes.
See Fig. 30, where it appears to be so.