We don't have such a thread, as we have nowhere near that kind of information on most models of hats by any maker. The thread with the most Dobbs info in one place is The Dobbs Diner, which has a lot of hats, ads, and info.
I also ran a quick Google search for the model name you gave and came up with one of those services that allows you to pay to see the past results of auctions (who does that?), which showed an auction result for a 1938 ad for your hat. It's not a range, but it's a good starting point.
Thanks for that info! I gleaned the Dobbs Diner thread and came up with an empty plate. (sorry, bad pun) However that would be about right for the hat I have. It has a liner but the liner has a... hard plastic feel too it, not like an oil cloth or onion skin, from Rogers Peet Co. Should probably post some pics? I finally mastered that!
Thanks Lefty for what you found!
Eric