Without trying to find out the exact provenance of the published letter there are several possibilities to explain what might be going on. I think they are 'close' enough to indicate that the one we are used to is a reproduction. Picking up on the differences listed by everyone on this thread it seems apparent that the letter we're used to has some reasonably major alterations or corrections.
Looking that the side by sides and dave's animation you can see that there is a 'cut-off' starting at the top left and encompasses the D, M and E. The top halves of the M and E appear to have been reconstructed. The D is cut off at the mid point. The overall appearance of the thickness is obviously different and I put that down to copy degradation and this seems to have dictated the style of the reconstructed sections.
The uppercase A in initials vs the lowercase is quite telling. That's a reasonably hard thing to get wrong so I have to assume that the degradation must have been reasonably severe to have resulted in that mistake. As I have already stated we don't know the provenance of how we ended up with that altered version but something that I think might have come into play in the right time frame was fax machines. Ok for typed letters at the beginning but not for anything else. I mean, even when I was starting out as a designer the bloody things were useless so I can only imagine how they must have been in the very, very beginning. We were constantly having to redraw things from clients because they had been faxed and with deadlines looming there was no choice.
It depended on the type of fax and the original and so on and so on but the track record and the quality was not great. Add in other factors like ink levels, spread etc and it was a lottery sometimes as to what would come out if the things lol. Also it has to be remembered that the original would have been photocopied before it could be faxed so that's another level of integrity and definition loss. There's every chance too that it was photocopied whist inside a protective sleeve with one of those nice cataloging stickers on it - possibly right across the top half of those uppercase letters on the top line. That would have been cut out of the image at the other end (literally) in pre press to get the things ready for print. You had to do what you could to get things ready because more often than not those presses didn't wait and if they really had to well someone was paying for that cost. It was cheaper to make do with what you could.
In that respect I see nothing suspicious about what we are looking at here. You kids don't know how good you've got it with the digital age.
