Tuesday, March 12, 2019

How Rare Is It?

Reknowned Numismatist Q David Bowers developed a Universal Rarity Scale years ago.  PCGS has also developed a rarity scale.  Using the surviving population, both scales can be applied to any coin series.  It's important to note that both scale are arbitrary, as "Rare" is not particularly well defined.  Nonetheless, these scales can be handy.  Below I have them side by side to simplify conversion between the scales.


Bowers' Universal Rarity Scale PCGS Rarity Scale
Pop Scale Pop Scale Descriptive
0 URS-0 0 10.1  None Known
1 URS-1 1 10  Unique
2 URS-2 2 9.9  Ultra Rare
3 to 4 URS-3 3 to 4 9.8  Ultra Rare
5 to 8 URS-4 5 to 6 9.7  Ultra Rare
9 to 16 URS-5 7 to 9 9.6  Ultra Rare


10 to 12 9.5  Ultra Rare


13 to 14 9.4  Ultra Rare


15 to 16 9.3  Ultra Rare
17 to 32 URS-6 17 to 18 9.2  Ultra Rare


19 to 20 9.1  Ultra Rare


21 to 25 9  Ultra Rare


26 to 30 8.9  Extremely Rare
33 to 64 URS-7 31 - 35 8.8  Extremely Rare


36 - 40 8.7  Extremely Rare


41 - 45 8.6  Extremely Rare


46 - 50 8.5  Extremely Rare


51 - 60 8.4  Extremely Rare
65 to 125 URS-8 61 - 70 8.3  Extremely Rare


71 - 80 8.2  Extremely Rare


81 - 90 8.1  Extremely Rare


91 - 100 8  Extremely Rare


101 - 110 7.9  Very Rare


111 - 120 7.8  Very Rare
126 to 250 URS-9 121 - 130 7.7  Very Rare


131 - 140 7.6  Very Rare


141 - 150 7.5  Very Rare


151 - 160 7.4  Very Rare


161 - 170 7.3  Very Rare


171 - 180 7.2  Very Rare


181 - 190 7.1  Very Rare


191 - 200 7  Very Rare


201 - 210 6.9  Rare


211 - 220 6.8  Rare


221 - 240 6.7  Rare
251 to 500 URS-10 241 - 260 6.6  Rare


261 - 280 6.5  Rare


281 - 300 6.4  Rare


301 - 350 6.3  Rare


351 - 400 6.2  Rare


401 - 450 6.1  Rare


451 - 500 6  Rare
501 to 1000 URS-11 501 - 550 5.9  Rare


551 - 600 5.8  Rare


601 - 650 5.7  Rare


651 - 700 5.6  Rare


701 - 750 5.5  Rare


751 - 800 5.4  Rare


801 - 850 5.3  Rare


851 - 900 5.2  Rare


901 - 950 5.1  Rare


951 - 1000 5  Rare
1001 to 2000 URS-12 1001 - 1250 4.9  Very Scarce


1251 - 1500 4.8  Very Scarce


1501 - 1750 4.7  Very Scarce


1751 - 2000 4.6  Very Scarce
2001 to 4000 URS-13 2001 - 2500 4.5  Very Scarce


2501 - 3000 4.4  Very Scarce


3001 - 3500 4.3  Very Scarce


3501 - 4000 4.2  Very Scarce
4001 to 8000 URS-14 4001 - 4500 4.1  Very Scarce


4501 - 5000 4  Very Scarce


5001 - 5500 3.9  Very Scarce


5501 - 6000 3.8  Very Scarce


6001 - 6500 3.7  Very Scarce


6501 - 7000 3.6  Very Scarce


7001 - 7500 3.5  Very Scarce


7501 - 8000 3.4  Very Scarce
8001 to 16000 URS-15 8001 - 8500 3.3  Very Scarce


8501 - 9000 3.2  Very Scarce


9001 - 9500 3.1  Very Scarce


9501 - 10,000 3  Very Scarce


10,001 - 15,000 2.9  Scarce
16001 to 32000 URS-16 15,001 - 20,000 2.8  Scarce


20,001 - 30,000 2.7  Scarce
32001 to 65000 URS-17 30,001 - 40,000 2.6  Scarce


40,001 - 50,000 2.5  Scarce


50,001 - 60,000 2.4  Scarce
65001 to 125000 URS-18 60,001 - 70,000 2.3  Scarce


70,001 - 80,000 2.2  Scarce


80,001 - 90,000 2.1  Scarce


90,001 - 100,000 2  Scarce
125001 to 250k URS-19 100,001 - 200,000 1.9  Scarce
250k to 500k URS-20 200,001 - 300,000 1.8  Common


300,001 - 400,000 1.7  Common
500k to 1M URS-21 400,001 - 500,000 1.6  Common


500,001 - 600,000 1.5  Common


600,001 - 700,000 1.4  Common


700,001 - 800,000 1.3  Common


800,001 - 900,000 1.2  Common


900,001 - 1,000,000 1.1  Common


over 1,000,000 1  Very Common

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