I have Serial # 452 in my collection, but can not find the quantity produced other than the 500 you refer to.
In year 2007 "Year of the Pig" my serial number is #639, however the quantity listed is 500.
In year 2010 "Year of the Tiger" the Serial Number is replaced with the quantity of 600.
Is it possible the you have acquired the actual chip submitted in the guide?
I can not answer the true quantity's produced in these series in question.