[Arran]

Well it does have 1934-35 RCA/G.E style knobs so those don't belong. I can't comment on the speaker but if it looks like someone spliced the cable going to it that's a good sign that it is a replacement. The tubes installed do not make sense, the 80 is a rectifier which is normal, but the 47 is a 2.5 volt power output pentode, the 57 may make some sense as it's also a 2.5 volt tube used as a detector/amplifier, but the 48 is a 30 volt power output tetrode popularly used in 32 volt DC sets so that tube couldn't possibly work in this set.
Regards
Arran