Springfield was the name Stevens used for the "econo version" of the Stevens Model 94. Yours is a Model 1929, made 1929 to 1945. On the right side of the receiver, it should say 1929 Model, or not, I've seen both.
Kimblelr, sorry I took so long to get back to this, been busy taking care of things after my Dad had a fall at the rest home. He's okay, twisted his knee, and now pestering me for another pineapple milkshake!
Anyhow, that push button release has me stumped, I've seen it before, but can't place the model number. The Model 94 has been made with more different release mechanisms that any other shotgun I know of, and might have a record for model variations. They started with the 94, then 94A, 94B, etc, and then some of those models were broke down into "series", like a Model 94C Series K. The last version I know of is the 9478, and it has a release button on the bottom, in front of the trigger guard, that looks more like a plastic .22 short magazine than a button.
The only online photo I could find that was exactly like yours, was mislabeled as a 94C, and yours is an older model than a C. I'll do some more searching when time allows, if I find something, I'll post it here.