[Hammarlund] Can You Identify This Ancient RCA Radio?

[Duane Fischer, W8DBF]

The radio described below, I think is a RCA Radiola model 30a. When was it made?
What is it worth? What is it's history? Thanks.	
	
It's an RCA -- and NOT an RCA-VICTOR!.  It's an AC radio, clearly from well
before 1930 -- and it's tube line-up includes a row of SEVEN 199's (Actually TSX
199).  The Power-supply-amplifier chassis has two type 81 rectifiers.  Each
looks like an oversized type 45 tube with no grid in it!  Takes two tubes for
full-wave rectification!  Output tube is a single 71-A (CX-371-A).  The 199's,
of course, are that beautiful almost-miniature size.  The Rectifiers are
over-sized globe tubes and the output tube is a normal old globe shape.  All
appear to be the original tubes!  The dirt all over the inside clearly seems to
confirm that all is "original". I was really surprised upon reading the
fine-print on the lables that this radio was not the TRF which it appeared to
be, but actually was an early superhet from the years that RCA, alone, had the
patents, and before their purchase of Victor!  Lloyd says that sometime
recently, out of curiosity, he plugged it in to see what would happen.  And it
actually worked!