[Eliot Ness]

Eric, unfortunately I looked through all of my Floyd Paul west coast documentation and Gernsback manuals and didn't find your set.  I did find this ad for a Falck (made by Advance) that has a similar offset knob arrangement as yours:

[Image: http://i.imgur.com/nVQ2vg9.jpg]

That ad is dated September 1930.

You have a pretty cool early west coast set on your hands and I doubt that very many like yours were made.  Unfortunately Los Angeles was the first to start pumping out midget/mantel sets and the technology was rapidly advancing so a lot of these early sets are not documented.  I have three west coast sets that are not documented anywhere either: a Gilfillan, a Falck (Advance), and a Crown.

Even some of my documented sets like my Jackson Bell Peter Pan used two or three different chassis's during early and late runs.  You might want to start looking through Rider manuals or go to Nostalgia Air and look for similarities to any Jackson Bell, Advance, Keller-Fuller, etc.:

http://www.nostalgiaair.org/Resources/

Using a database search for that tube line-up it flags a Steinite 420/450, so you might want to look and see if they are similar:

http://grillecloth.com/sylvania/tubelist...ubmit&db=5