The co-authors of Double Dimes: The United States Twenty-Cent
Piece, Lane J. Brunner and John M. Frost, are seeking collector
input to determine the rarity for two die marriages of 1875-CC Seated
Liberty 20-cent coins.
In the spring issue of The Gobrecht Journal, the printed
periodical of the Liberty Seated Collectors Club, Frost details
the known die marriages with reverses differentiated based on the
position of the letters of the CC Mint mark of the Carson City Mint.
The researchers describe the four reverse dies, listed here in terms
of frequency of their appearance on the five die marriages, from most
common to most rare:
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High Close CC, Reverse B: The top of the first C of the CC Mint mark
is positioned to the left of the second arrow barb. This die is
responsible for nearly 75 percent of extant 1875-CC 20-cent coins.
Found on the die marriages BF-2 and BF-3.
Wide CC, Reverse C: The first C of the Mint mark is high and further
left than the first C on the Reverse B die, with the second C further
to the right than on the B reverse. This die is common, though less so
than the Reverse B, with nearly 25 percent of known examples. Used
with the die marriage BF-4.
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Low Close CC, Reverse A: The first C of the Mint mark is positioned
below the second arrow barb and both C's tilt to the right. Rare and
first reported in 2013. Study of obverse die cracks indicates that it
was the first reverse die used, hence, the reverse is designated as
Reverse A. Used on the die marriage BF-1.
Low Close CC, Reverse D: The first C of the Mint mark is positioned
below the second arrow barb, with the first C tilted right and the
second C tilted to the left. Rarest of the reverse dies. Used with the
BF-5 die marriage.
Frost and Brunner are asking collectors with 1875-CC 20-cent coins
to identify which die marriage they have and report to the authors at
email@example.com so a census as to rarity of
the Low Close CC coins can be made.