I got in a settei pack the other day, and there 
were some duplicates. I noticed one sheet of a 
particular design looked very, very good, with 
crisp lines and all; another sheet of the same 
design was obviously an nth generation copy with 
broken, fuzzy lines and copy-marks. So even if it 
all came from the studio, there's likely to be 
first-generation copies from the originals, and 
there's also likely to be seventh-or-eighth 
generation copies of copies.