The die must have been chosen for cleanliness. Deeply engrained frosting from sandblasting is seen on the reverse and obverse.
I wouldn’t think it unbelievable if the die is going through preparation, that a strike evaluation before further proofing steps, is required to weed out Denver mint marks.
That, with this type of strike would be an agreeable reason we only see one, (It probably being discontinued for this reason afterward) That can strengthen our assumption it was under evaluation.
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