It's a Stevens. It should also say Stevens Arms Co, Chicopee Falls. Stevens dropped the Springfield name in 48 and merged it with the 311 in 49, so good luck on finding barrels and forend iron. Early 311 barrels will probably work but I've been trying to find barrels for a 311A for some time with no luck. I don't think the receiver is coded for gauge altho 12 & 16 share the same receiver. As do 20 & 28.
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