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   The 1864 w/L type involved more changes than just the addition of Longacre's initial. The 1864 no L had the same design as the copper-nickels that preceeded it, while the new w/L version was the prototype for the bronze coins that followed. Like the copper-nickels the no L featured a tighter feather formation that didn't overlap in the same pattern as the new design.
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Pre-1864 w/L design
1864 w/L modification