The Survival Estimate represents an average of one or more experts' opinions as to how many examples survive of a particular coin in three categories: 1) all grades, 2) 60 or better, and 3) 65 or better. These estimates are based on a variety of sources, including population reports, auction appearances, and personal knowledge. Survival estimates include coins that are raw, certified by PCGS, and certified by other grading services.
Numismatic Rarity
Numismatic Rarity converts the Survival Estimate for a particular coin into a number from 1 to 10 (with decimal increments) based on the PCGS Rarity Scale. The higher the number, the more rare the coin.
Relative Rarity By Type
Relative Rarity By Type ranks the rarity of this coin with all other coins of this Type. Lower numbers indicate rarer coins.
Relative Rarity By Series
Relative Rarity By Series ranks the rarity of this coin with all other coins of this Series. Lower numbers indicate rarer coins.
Gordon Wrubel:
San Francisco Mint 1873 $20. Libs come with Open and Closed 3s. Unlike their Philadelphia Mint counterparts, the Open 3 variety is about three times scarcer than the Closed 3. If you are examining a coin that is not designated, and you do not have the photos above for reference, check the ball on the lower loop of the 3. On the Open 3, the size of the ball is about the same as the opening of the 3 and may just pass through it. On the Closed 3, the ball is too large to pass through the constricted opening. As you can see from the Condition Census listing above, this variety is a rarity in the grade of MS 62 or better.
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