Thank you Rich.
The main point I was trying to make is that PoP reports are simply a snapshot at one particular moment in time, so variations in card counts from just a few such reports may not be an accurate indicator of the sheet configuration.
Certainly, the PoP reports can't tell us how many cards were destroyed, thrown away, still reside in a shoebox, or remain in collections. Moreover, the PoP counts seem to be in the 10s to 100s, and certainly many more cards than that were printed and distributed. However, I find them useful since they provide some relative information. And if this data can be accumulated over an extensive period of time with duplicate cards eliminated (re: don't count the sale of the same card more than once), then a more accurate reconstruction may be possible.
Wouldn't it be so much simpler if Topps had records such as photos, notes, etc. and made such archival material available for research purposes?
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