Notice the seams in the pages between 50 and 49 and then the same seam between 49 and 50. Obviously there was alteration to the seam taken before or after these photos were taken. But there is no explanation of when it was done. These differences and others raise questions about how much change and editing was done to the scroll when the photos were taken.
see the difference
Now compare the same seam at the bottom
note the difference