1867 Proof Nickel Pattern - J-584b

Coin Details

Description

A second compositional variant of the J-584 design, this "b" suffix variety represents yet another planchet type tested with the same die pairing. The existence of multiple suffix varieties for a single die combination underscores the Mint's emphasis on metallurgical optimization alongside design refinement. The copper-nickel alloy presented production challenges beyond die wear, including planchet preparation difficulties and striking pressure requirements that differed from the Mint's extensive experience with softer metals.

Rarity Notes

R.8. Extremely rare, fewer than 4 examples believed known.

Cross References

Pollock-3620b