Cinderalla cels have got to be the oldest, those 
are from the 1930s.  I've got a Tom and Jerry 
from 1958 (nit witty kitty) The paint is coming 
off of mamma two-shoes but the cel is otherwise 
in really great shape. I hope to get it fully 
restored someday being that this is one of my 
favorites (sorry, don't have a scan yet).