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Message:: [QUOTE="calcol, post: 3367888, member: 77639"]Good point, Doug.  Here are a few more rarity scales.  I need to be careful.  I may become a collector of rarity scales.  <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /> Cal =================================================Sheldon scale:Yes, he had a rarity scale in addition to a grading scale. U - UniqueR8 - 2 - 3 knownR7 - 4 - 12 knownR6 - 13 - 30 knownR5 - 31 - 75 knownR4 - 76 - 200 knownR3 - 201 - 500 knownR2 - 501 - 1250 knownR1 - more than 1250 known Scale used in U.S. Pattern Coins, 10th ed. and some earlier, by J. H. Judd:It's the same as the Sheldon scale but with high and low divisions of R7 and R6. U - UniqueR8 - 2 - 3 knownHigh R7 - 4 - 6 knownLow R7 - 7 - 12 knownHigh R6 - 13 - 20 knownLow R6 - 21 - 30 knownR5 - 31 - 75 knownR4 - 76 - 200 knownR3 - 201 - 500 knownR2 - 501 - 1250 knownR1 - more than 1250 known Scale used in American Half Cents by Cohen.Based, in part, on the Sheldon scale. R8 - fewer than 4 knownR7 - 4 - 12 knownR6 - 13 - 30 knownR5 - 31 - 75 knownR4 - 76 - 200 knownR3 - ScarceR2 - Not so commonR1 - Common[/QUOTE]