CV1932 looks like a match to your picture- it's a triode equivalent to 6J5G or L63. It doesn't make a lot of sense with a couple of RF pentodes, though.
http://www.r-type.org/exhib/aaa0665.htm
6U7G is a vari mu pentode.
http://www.r-type.org/exhib/aaa0665.htm
CV1032 is an output valve of sorts, but it's a battery double triode which hardly sounds right either.
http://www.r-type.org/static/webcv03.htm
Is one of the pentodes doing duty as the output valve? Not impossible- it would be good for maybe a watt of audio.