Thanks for the information. I just today received a 311 made for Sears under the JC Higgins name. I took it apart and found a "D" in the circle on the inside of the receiver and the underside of the chamber end of the barrels.
If I understood your post correctly, that would make this shotgun a 1952 model?
"The number one problem with America is, a whole lot of people need shot, and nobody is shooting them."
-Master Chief Hershel Davis
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