So folks I am hoping someone on here can help me out. I have a Model 340 Series E in .222 Remington and I am attempting to discover the DOM. Best I can find is that there should be a date stamp on the barrel or receiver that will have a letter telling me what year it was manufactured. A should be 1949 and X 1970 With a few letters that are not used in between. I have thoroughly looked over the barrel and receiver and could only find the markings I have in the pictures. I hope someone could help me decipher what I am looking at.

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