Hmm....
I can't see this deck being produced by HOPC. They seem to be more into more "modern" decks. This classy, old-era deck might not gel with decks like the NOC and Mechanic decks. Then again, the killer design might overshadow the HOPC's trend!
Well then good sir how do you explain the Americana?
Easily - they were simply the distributor. Russ had already paid for everything, the decks were going to be made, etc., he just wanted someone else to do the heavy lifting of selling most of it.
There's no set "style" that HOPC has for their decks. They run a range of styles, the only real determining factor being whether Alex and/or Kevin like the deck.
Appearance-wise, I'd say it would look right at home in the inventory of either E or T11 right now. They're both going a lot lately for elegant boxes with a lot of metallic foils.
I will say one thing, trickz - consider doing the backs a little differently in terms of the color palate. T11's original design for the Monarchs had a nearly-identical combination - and they ended up destroying all but a single gross of them due to how terrible it looked. The metallic gold ink in the fine pattern practically disappeared into the dark background - it's darker than you think it would be. Of that gross, only 111 were put up for sale and they vanished a long time ago. Skip ahead to the second-most funded deck on Kickstarter, the "Misc. Goods Co." deck. The box showed everything in a cool black-on-white pattern, but they did the backs in the same metallic-gold-on-black. Almost all of the fine detail was lost because of the colors being too close together. You don't have to take my word for it - just pick up a Misc. Goods Co. deck or look at their back design poster.
As I see it, there's a few options that wouldn't seriously upset the design. The least-intrusive one would be to simply substitute a brighter yellow for metallic gold on the card backs, giving you a much better contrast between it and the black/dark brown/whatever that dark color is. T11's solution was to swap black for navy and gold for white - it didn't go over as well with the fans. Another would be to try silver metallic inks on the card backs instead of gold - but this would significantly alter the appearance of the cards as well, possibly to its detriment as far as popularity goes.