I have been reading all about the population numbers of the Wisconsin extra leaf error varieties. The most popular count is around 6000 total. How could that be? These people are guessing like all of the rest of us. With 4474 graded by NGC alone as of  8/22/06. there could be tens of thousands out there not yet graded, counted, being undisclosed or yet to be discovered. The only thing we know for sure is the total number of coins produced . Of the 453 million produced, some number of them were so different that they are referred to as Wisconsin "extra leaf high" and "extra leaf low". The only logical way to count them is to look at the number that were produced by each individual die. The mint does know how many dies were used and how many coins each die produced and for what date and specific period of time they were used. Since they insist on keeping the origin of the errors a secret then maybe a way to make an educated guess is to look at the number of coins produced by each individual die. Most dies average well over 100,000 coins produced. I have seen a number of these Wisconsin dies and the lowest number of stated coins made by any individual die is 68,675. This amount represents far too low a number to have been replaced . I believe that this particular die is at least one of the dies which produced one of the error varieties if not both. If you have one of these dies with a similar low production number you probably have the other die if another exists. The mint destroys the actual end of dies in order to prevent reproduction but in doing so it also destroys any real evidence of what that die ended up looking like. But if this is the die that produced them then we can assert that the total population or amount made was 68,675.