Here is a coin I just obtained. The streaks are same direction both sides.
Am I correct in assuming the metal was not properly mixed and the unidirectional streaks are from rolling the sheet to thickness prior to stamping the blanks?
It is not actually as bad as these photos make it look. I adjusted the camera and light angle to accentuate it. I first tried to scan it and the streaks were indiscernible.
Actually quite a nice crown sized coin.
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Jeff