The punch marks on the lug may be someones attempt to "peen" the sides of the lug out a few thousandths of an inch. Normally this is seen on the sides of the lug around the edge of the "hook" in an effort to take up slack resulting in an "off face" condition. I have never seen the sides of the lug peened like this, and the punch marks are farther apart than you would expect if expanding the width of the lug was the goal. Or, it could be something entirely different. Just a guess.
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