Hope I am wrong and will happily be, but I must agree, the document has some anomalies that seem to indicate a photocopy, and an older one at that. Look at the seam along the fold in the middle. Unless the paper has somehow stretched or is deeply scored that could be toner lifting from the center of the lettering. Also, there is what appears to be a copied hole punch that has again been punched through (I can't see the document as I write this but it is near the top, with a dimple sitting next to one of the punched holes) Also, (and this might just be because of a low-res image)the detail appears to show script broken as in an older photocopy machine. Also, this document is in a frame. Did it come that way? Can it be removed? I once owned a 1870 EKII doc that I thought was an original, as it was copied onto old looking parchment paper, but it turned out to be a repro. There are also a number of specks in the open areas, which may indicate dust on the glass of a copier. Again, I am speculating, but would love to see the doc removed from its frame and a closeup of the center line.
Cheers,
Imperial