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Message:: [QUOTE="Oldhoopster, post: 3150648, member: 84179"]Let's say you actually looked at "thousands" of 1990 cents.  There were 6.8 Billion (with a B) 1990 cents minted in Philadelphia.  If you looked at 1000 1990 cents (20 solid rolls), you looked at a little less than 0.2 parts per million (0.00002% if I kept the decimals under control).  0.2 parts per million is the equivalent to 1 second in just under 2 months. Now let's examine what needs to happen for a proof to enter circulation.  1990 Proof cents were issued in plastic cases.  Someone would need to take that set, make a decision to break it open (probably beating it with a hammer), and spend the coins for face value.  Why they wouldn't take the set intact to a coin shop and sell it for a few times more than the 91 cents in face value is beyond me, but impaired proofs are occasionally found in circulation, so it happens. In 1990, the mint issued 3.3 million proof sets.  Out of those 3.3 million sets, how many were broken up and spent for face value?  100? 1000? 10,000? Can't be many According to PCGS, an estimated 200 No S proof cents are believed to exist.  That's 0.006% of all 1990 proof sets had a No S Cent. So let's say 10,000 proof sets were broken up and spent (personally, I think that's high, but since I don't have any hard data, it will work for this example).  10,000 broken and spent sets x 0.006% sets with a No S Cent = 0.6!  That means you would expect to find less than 1 No S Proof cent in circulation.  Even if we round up, out of the 6.8 Billion 1990 cents put into circulation 1 would be a No S Proof.  1 out of 6.8 Billion I don't think you found it[/QUOTE]

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