wert,
I'm not sure what kind of offset printing press
Ashton Potter used but most presses printed
more than 50 stamps per
"sheet".
Especially when they were in the smaller format as
these were.
What you have there is one
pane of 50 which
was just one
pane from a
sheet of 200.
The variety only shows up in one pane and it looks like
you don't have that one.
