UNITED STATES: 5 cents, 1918/7-D, PCGS graded G6, Buffalo type. The creation of a working die for the coin press required that the awaiting die be impressed at least twice from a working hub, with the die being annealed (softened) between impressions. On this obverse die two hubs bearing different dates were used, and it's presumed that the 1918 hubbing came last, as this date is more deeply impressed into the die. The die was then shipped to the Denver Mint, where it was used for an unknown number of overdated nickels. This is by far the most desirable variety in the Buffalo Nickel series, though certainly not the most rare. The first recorded sale was an auction appearance in 1930, and the variety may have been unknown before that time. This would certainly explain the rarity of Mint State pieces, as the window for saving these had long been closed.
Estimate: 550-650 USD