I believe you mean 7 digit serial number, they did not go into the 10s of millions. Your gun is from 1949. Looks to be in decent shape for it's age. Finish and blue look original, but you are missing the front sight hood and it has added sling swivels, which are not factory. Still, it's pre-64 so it's more desirable. Previous poster has the value spot on. Around $375 I'd say. A nice classic gun.