No it's not hard to say. If the image pixelation is reasonable for archival image storage, it is very unlikely. There will be some probability of having two letters in different places have the pixel pattern, but that probability is low. How low?
Experiment and find out! That's my advice. Attempt to duplicate what the process history of the proffered image might have been.
It would be helpful to know which models of equipment that department Hawaii used over the years, and certainly in 1961.
The alignment of tab stops, of inter-key-impression, interline gap and typefaces in the Nordyke and other COLBs of that era are good data set to start with. That should narrow down or suggest a particular model.
I agree with all the points.
What is really needed is the actual supposed certified copy in physical form. Along with the actual physical COLB that was the subject of the Fact Check photographs.
But ‘the most transparent administration in history’ will not be....transparent. And the pathetic media refuse to do their job and challenge them. We, as citizens, should not have to play guessing games with digital images released from the White House version of Pixar.