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Yea, the early 1900s were not all that far away from the hay day of the heavier grinds so it may have been extra hollow compared to the others they made at that time. By modern standards it would be...

Near as I can tell both are correct but image #2 just has more grinds illustrated. You have to consider also that the definitions of what is a full hollow ground seems to have changed over time. I'd...