boxplayer4000
Prolific poster
From about C6 (which is the C two octaves above 'middle' C) there are normally no valves.None of the smaller reeds have leather valves, I'm assuming this was as designed:
Picture 2-6 (of the treble sounding board leather surface): The dark patches probably indicate that there is some air leakage between the reed blocks and the sounding board. It's likely that the reed blocks have taken on a slight distortion (no shame to it at that age). Careful rubbing of the reedblock on sandpaper, placed on a (flat) sheet of glass will help.
The reed valves on picture 2-4 do not look like genuine accordion quality valves. ALL valves and wax are expendable and only complete renewal is recommended.