Jason,
I'm perplexed on this issue. I do follow the old 44 and 44 and 1/2 actions a bit but know little to nothing on the model you have or any of the other "boys rifles". I've owned a few of the "pocket rifles" but ditched 'em quick as they were worn out sloppy guns. As far as I am concerned, the only Stevens guns worth having were the old 44 and 1/2 actions and maybe their 44 actions. These were fine target guns in their multitude of variations. I once had a 44 action that was in .22 LR and was in full target with the fancy wood, Swiss buttplate, double sets triggers, and fine vernier sight.
I had to resort to looking your gun up in my books and found it was made from '14-'16 (as Sureshot wrote) and was chambered for the 44 shot cartridge which was nothing more than the 44-40 with a wooden bullet filled with small shot. I have an example or two here and the headstamp reads .44 G.G. (for Game Getter) As your gun will chamber the .410 shell, well, it was probably made that way as the gun was an economy model and "why spend the money to have a chamber cut in it" was most likely Steven's thinking.
Your gun does look "clean" as most of these economy models were used and abused. The way I see it, your gun is not gonna make you rich if you sell it and beings that not many are seen, I say, "hold on to it" and be the caretaker of that gun while you are breathing. It is neat and will make for some fun afternoons loading up 44-40 shotshells for it--you can even play with round balls, etc.
My book has it valued at between $150-$400 and my guess is that your gun is at the upper end of it--------Stay cool brother!

---------------Sixgun