I dont see any green but that may be the scenes. IMHO old sets
always lacked in red but B&G were good. The rest of the pix looks
very good. Follow Zenos old rule " make it as perfect a B&W set
as you can BEFORE turning up the color".
If grey scale is VG+ go to the demodulator stage. I once had one
of these Zenith round sets, maybe not the same chassis. Outdoor
scenes showed wonderful green trees. Also had an early Admiral &
it was the same. Keeping brite & cont down along with very little
room lighting is the norm. Even new they could never light up a room.
It wasnt til Chromacolor that things really got better.........
73 Zeno
LFOD !