Barrel flat repair code markings
The barrel flat repair code markings are a series of numbers and letters on the bottom of the left barrel flat, which I have circled in this picture. The four numbers/letters on the left, EPP3, are what would be typically found on guns that were returned to Remington for repair work. In this case the E is October and the PP is 1945. The 3 means it was received by the service department and that's all we know about it. Nothing about what was done is known.
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