The well is deep...but I don't think I'd take a sip
That
Spring Field Arms Co. is interesting. Springfield was of course a Stevens lower price line, and I've never seen the 2 words, and couldn't find for what co. the gun was tradenamed.
An odd sideplate and different action sculpting H&A
J. Stevens Arms Co. changed from their lower priced line being Riverside Arms Co. to Springfield Arms Co. in the 1928/1929 time frame, long after these sideplate guns were being made.
Drew, the lower gun in your post is the No. 210 as shown in the 1914 Hopkins & Allen catalog.
In addition to the No. 210, they offered a No. 220 with ejectors --
There was also a No. 230 ejector gun with engraving.