If anybody reading this post is able to time travel someday, then you must agree to travel back to American Lithographic Company in 1909 - 1910 and take photos of uncut sheets of T206 and the equipment they were printed with. You must then travel to a point in time of 6:16 pm Central Time, Jan 31, 2013 and post your photos so we will know definitively the size of the T206 sheets.
PS, pick up a couple of Wagners for me while you are there.
Best Regards and Good Luck,
Craig